Hoppy's friend Dennis owns a rich gold mine. Frazier who owns the adjoining mine and wants the Dennis mine, has Dennis killed. Hoppy steps in to take over running the Dennis mine and learns Frazier's men sneak into and work the Dennis mine at night. Hoppy captures one of Frazier's men only to be captured in return by Frazier and left to die in a burning building.
Stephen Westcott and Ed Martin scheme to put Jane Travers' wagon line out of business. They want to use it take over all the wagon- train traffic going west. Hoppy, California and Lucky must make sure that doesn't happen.
When three Texas Rangers try to investigate kidnapped Mexicans being used as forced labor in the mines of Silver Bullet, they are framed for murder by the town's corrupt sheriff.
When Hoppy's falsely accused young friend is killed while supposedly trying to escape from jail, an embittered Hoppy is blamed and drummed out of the Texas Rangers.
Lee Garvin has eloped with the daughter of a railroad man who didn't approve of the marriage. Hoppy steps in when the young man is framed for murder.
After schoolteacher Abbott breaks the windows in Mawson's saloon because it is too near the school, Dink Davis' henchmen hold her hostage in Mawson's cabin to frame Mawson as means to remove him as a competitor. (Condensed from the 1948 Movie)
A swindler sells worthless land to a professor and when the land proves to have a rich silver lode, the swindler tries to regain ownership by nefarious means and the collusion of a dishonest banker. (Condensed from the 1948 Movie)
An anonymous letter and counterfeit bill brings Hoppy and gang to a Mexican border shanty town where they find a ruthless town boss that uses an idle mine outside of town for a counterfeit operation. (Condensed from the 1948 Movie)
California, at a will reading, learns he shares with six others an inheritance in which the survivors share equally as any of the others die and murder ensues so Hoppy begins an investigation despite being told the estate is worthless. (Condensed from the 1947 Movie)
Needing supplies Hoppy and gang go to Mesa City and find a big celebration about an irrigation project and that the project promoter is a crook but not before California is blamed for bank robbery because of a switch with the robbers. (Condensed from the 1947 Movie)
The boys arrive at Jeff Potter's inn for Lucky's wedding to find the bride has postponed it to due the disappearance of her uncle who is found dead in a mine and others continue to disappear from the same room which the uncle used. (Condensed from the 1948 Movie)
Hoppy and gang discover a wounded young woman who they learn is being coerced by a judge who sent a robber to jail to tell them the secret she knows of where the robber hid the gold so that the judge and friends might enrich themselves. (Condensed from the 1946 Movie)
At the request of an army officer friend, Hoppy goes to retrieve the officer's deserter son from an outlaw enclave where he learns the son is being forced by the ringleader to take part in scam to take gold in cavalry disguise. (Condensed from the 1946 Movie)
Hoppy helps an archaeologist friend pursue an expedition by promising the area tribe that there will be no looting of burial places but for gold an expedition member betrays them with a gang that rustles castle disguised as tribe members. (Condensed from the 1947 Movie)
With a storm approaching, Hoppy and his pals take refuge in a church in an abandoned town, When Riker and his men arrive to tear the church down, Hoppy kicks them out. Riker then has the church surrounded and those inside find themselves prisoners. (Condensed from the 1947 Movie)
When repeated sabotage occurs in Tom Smith's railroad yard, Hoppy and gang are hired to investigate undercover while suspicion falls on Smith's son-in-law Lee who the real culprits attempt to frame. (Condensed from the 1948 Movie)
Hoppy and California must avoid angry, suspecting ranchers to find Lucky who has been hypnotized by snake oil salesman Doc Richards to deliver to him the proceeds of the Cattleman's Association sale made by Hoppy. (Condensed from the 1947 Movie)
Hoppy and Red are asked to investigate missing shipments of Army rifles. Their efforts to find the guns before they reach the hands of Mexican revolutionaries are hampered by a sharp-shooting lady marshal.
When a young Mexican is framed for murder, Hoppy and Red hide him from a lynch mob and attempt to trap the real killer.
Hoppy tries to help a reformed criminal, the fiancée of a wealthy rancher's daughter, when his former associates try to blackmail him into robbing the Cattlemen Association's safe.
Hoppy and Red combat a rancher and a crooked lawyer who are trying to drive immigrant settlers off their land.
Hoppy saves an innocent man from hanging and tracks down a murderer who's manipulating the feud between two rival ranchers over water rights.
Hoppy tries to prove that a traveling preacher is behind a series of robberies by three men who have a habit of vanishing into thin air.
Hoppy uses an incriminating letter and a crooked card deck to hunt down the murderers of a small boy's parents.
Hoppy's efforts to save a young woman's mine from swindlers are complicated when Red Connors develops amnesia and claims to be a Spanish nobleman.
Hoppy uses an intricately carved bracelet to trap some swindlers who are trying to cheat the Indians out of their oil-rich reservation lands.
A blind Mexican woman asks Hoppy to help her fugitive son, who's been falsely accused of murder.
When Red Connors buys some arid land on the strength of a promised irrigation project, Hoppy investigates and learns that the promoters of the scheme are guilty of forgery, embezzlement and murder.
The U.S. Army asks Hoppy to investigate when a herd of horses desperately needed for the Spanish-American War is stolen from the ranch who was supposed to supply the herd. The ranch workers insist the horses were rustled by Mexican bandits, but the Mexican authorities claim that no herd of horses crossed the U.S.-Mexican border, legal or illegal.
Hoppy and Red try to settle a dispute between Twin Rivers cattle ranchers and sheep grazers.
Hoppy helps a young man and woman who are framed as counterfeiters just before they are to claim their uncle's estate.
Hoppy and Reverend Adams hope to reform young Johnny Bolton from his criminal ways but his propensity for meanness and his admiration for an outlaw of thirty years ago work against them.
As they ride into an apparently deserted town, Hoppy and Red are shot at, and then discover the town's only resident, also shot and left for dead.
A sheriff summons Hoppy to Stone Valley where a cattlemen's association which has padded interest and fees is about to foreclose on ranchers who can not pay because bandits rob supply shipments before they reach the ranchers.
Hoppy fakes amnesia in an attempt to save the Cattlemen's Bank and the local ranchers from ruin, springing from an embezzlement.
Hoppy pretends to be John Smith in a town in which Red has been made sheriff to investigate the uncannily efficient robbery of gold shipped from the area smelter while all must endure comedy records played in the Mayor's barber shop.
Hoppy encounters bank robbers who are trying to recover the loot they hid in an old wagon inside the Twin Rivers livery stable.
Hoppy and Red help the U.S. Immigration Service investigate the deaths of smuggled Chinese aliens.
Hoppy tries to prove that a gypsy boy's dead father was not a thief so that the boy can marry his sweetheart.
The Army sends Hoppy to Arizona Territory to investigate raids on a telegraphic construction project and after the project leader is killed, uncovers a conspiracy led by the owner of the area trading posts to stop the telegraph.
Hoppy uses a health tonic to prove the innocence of a convicted murderer and the guilt of the real killer.
When Hoppy and Red try to conduct an honest election in outlaw territory, the outlaws retaliate by getting Hoppy's nephew into trouble.
Hoppy risks death to convince the family and friends of vanished rancher Tom Murdock that his ghost has not returned from the dead to haunt them.
In his search for a gang counterfeiting Mexican currency, Hoppy learns that the Twin Rivers newspaper is printing more than news.
Hoppy tries to help a young Mexican laborer whose knife was found in a banker's back.
While investigating raids by white men dressed as Indians, Hoppy and Red find valuable copper on the Indians' land.
Hoppy tries to clear an old prospector who's been found in possession of the gold stolen in a train robbery.
Hoppy steps in when a notorious outlaw tries to force his honest father and brother to help him collect the reward for his own capture.
Hoppy helps an old prospector whose discovery of gold has earned him several new friends and enemies.
Hoppy steps in when the nephew of a contractor building a railroad is killed and all the construction plans stolen.
Hoppy helps an old settler and his son fight a land grabber who's determined to take over their ranch.
Hoppy frightens an outlaw gang by writing in prominent places the code numbers 3-7-77, the symbol of a band of vigilante terrorists.
Hoppy tries to trick an elderly woman's kidnappers by inducing Red Connors to wear her clothes.
Hoppy and Red arrest a young man whom they find wounded near the body of his uncle, but they soon learn that he's suffering from amnesia and try to clear him.
When a Mexican rancher accuses an innocent man of murder, Hoppy uses a black sombrero to clear the frame-up victim and save a wealthy young heiress.
While chasing a murderer, Hoppy and Red are locked in a shrine with an emerald religious statue during a Mexican festival.
Hoppy and Red are trapped in a burning house by a lovely young woman who has robbed a bank while posing as an old lady.
The foreman at Lazy J Ranch is behind the rustling of the ranch's own delivery of cattle.
Hoppy goes to town and helps a widow when con-men try to take her herd.
Local ranchers scheme to protect their revenue when a new railroad line threatens their business.
Hoppy and his friend Lucky deliver a herd of cattle to a rancher in Argentina and fight off thieves.
Hopalong infiltrates a town run by crooks and discovers the chief is none other than Ma Burton.
Hoppy is up against a phony European "baron" and his gang of horse thieve
Hoppy and Lucky arrive in a troubled mining town and hunt for gold thieves.
While Hopalong tries to foil a Wells Fargo stagecoach robbery, Lucky falls in love.
Hoppy and new sidekick California Carlson head to California to help out Lucky Jenkins.
Jane Travers enlists Hoppy and Lucky to help ferry a gold shipment across the Mexican border.
Hoppy, Lucky and California search for a mine owned by Trudy Pendleton after it was taken.
Hoppy and the Bar 20 boys are temporarily deputized and asked to wrestle control of the town back.
A lumberman is pitted against despoiler capitalist Preston Yates and his hired goons.
A former Bar 20 cowhand needs to stop the rustlers raiding his land.
Hopalong, California and Johnny pose as English detectives to find disappearing cattle.
A wealthy horse owner invites Hoppy to accompany him to Saudi Arabia to purchase prize horses.
Hoppy leads an expedition to find a gold cache among ancient Native ruins.
Johnny is accused of robbing a bank and Hoppy tries to prove his innocence.
A bandit who robs both Americans and Mexicans is causing each side of the border to blame the other.
Sheriff Hoppy must find a way to bring a group of outlaws outside of his jurisdiction to justice.
Three Texas Rangers try to investigate kidnapped Mexicans being used as forced labor.
As rustled cattle have mysteriously disappeared, Johnny sends for his friend Hoppy.
While oil drilling, Hoppy and California discover an underground well.
Stagecoach robbers take the money Hoppy was going to use to buy cattle.
A bad guy named Mark Foster murders the heir to a cattle ranch and puts an imposter in his place.
Hoppy is blamed when his falsley accused young friend is killed while trying to escape from jail.
A gang of outlaws is using force to become possessors of every ranch in the area.
Julie's husband has been murdered and land agents want her to sign away her property rights.
Hoppy's ranch is threatened by rustlers; Hoppy and the gang oblige as usual.
When he runs for sheriff, Hoppy is beaten by Jerry Doyle, voted for by the town's crooks.
A wounded girl knows the way to stolen gold.
The son of an Army friend is about the join an outlaw gang.
Someone tries to kill California Carlson and his kin during the reading of a will.
Treasures interred with the dead are stolen during a scientific study of Indian burial grounds.
Hoppy tries to save a church from being pillaged.
A bank robbery ruins Hoppy's holiday in Mesa City.
One of Hoppy's Bar 20 ranch hands is tricked into participating in nefarious activities.
Hoppy investigates mysterious deaths linked to a room at the Last Chance Inn.
Hopalong investigates a rash of mysterious accidents on a railroad line.
Hoppy sets out to catch a chronic breaker of saloon windows.
Hoppy protects a professor and his daughter from claim jumpers.
Hoppy tracks a counterfeiting ring.
A likable young man idolizes an infamous criminal.
Someone shoots at Hoppy and Red in a deserted town.
Hoppy and Red resolve to help local ranchers against an exploiter.
Drought threatens cattlemen and the banker extending their credit.
A banker asks Hoppy to trap robbers hijacking gold shipments.
A Southerner buys a wagon in which thieves hid money.
Hoppy goes to Mexico to investigate mass murders of Chinese workers.
A Gypsy seeks to clear his father of charges of robbery.
Saboteurs try to prevent Arizona's first telegraph line.
Gold thieves frame a young friend of Hoppy's for murder.
Hoppy's lawyer nephew represents a bank robber.
An evil ranch foreman tries to provoke a range war by playing two cattlemen against each other while helping a gang to rustle the cattle. Each cattleman blames the other for missing cattle. With the help of Bill Cassidy (Hop-along, because of an earlier bullet wound) and Johnny Nelson, the warring cattlemen join forces to do in the outlaws.
The grandson of the notorious bandit El Toro witnesses the murder of his parents by men trying to hijack the gold they were carrying. After El Toro saves the life of Hop-a-long Cassidy, Cassidy agrees to find and protect the boy, who is in hiding from the killers, whom he can identify. Cassidy and his partner Johnny Nelson, with the help of friendly bartender Spike, try to save the boy and bring down the man behind the gold robbery.
Rancher Arnold sends for Hoppy and Red to help fight the cattle rustler Nevada and his gang. Hoppy poses as a gambler to get on Nevada's ranch and meet the snuff taking boss who pictures himself another Napoleon. Hoppy's smoke signal alerts Arnold's men leading to a massive gunfight.
Hoppy returns to find Johnny in trouble. Buck Peters has been shot by Porter who made it look like Johnny did it. When Johnny flees he runs into Linda. He takes a liking to her only to learn her father Shanghai is one of Porter's gang. Going after Shanghai, he gets captured by the gang and Porter now plans to kill him. But Hoppy is near by and Johnny will get unexpected help from Shanghai.
An evil gang is involved in both cattle rustling and the robbing of stagecoaches. Hoppy must stop them without help from the sheriff who turns out be a major outlaw himself.
Ranch owner Sally Jordan is engaged in a fence war with rancher Big John Trumbull. Hoppy and Johnny, along with trusty sidekick Windy, side with Sally Jordan. They control a huge cattle stampede by using dynamite.
When a miner is murdered before he can file his claim, Editor Saunders sends for Hoppy. Now the new Marshal, Hoppy learns Lilli Marsh owns the murdered miner's claim and her henchman Blackie was the killer. After Hoppy and the ranchers take care of Blackie's gang, Hoppy goes alone to face Blackie and Lilli.
When Hoppy agrees to lead a large cattle drive north he runs into lots of trouble. First Anderson and Wilson join the drive to do what damage they can. Then Lewis and his men posing as Tail officials try to cut out part of the herd. When Hoppy sees through this ruse, they rustle some cattle and burn the camp.
Officials on both sides of the border are after an outlaw gang led by the Fox. They devise a plan where Hoppy is supposedly kicked out of the Rangers to become an outcast. When the Fox shoots his own gang leader, the famous ex-ranger Hoppy is recruited to replace him. Hoppy eventually realizes that the Fox is posing as the town idiot Loco. But the Fox is also on to Hoppy and uses Windy and little Molly to set a trap to for him.
The ranchers are having their cattle rustled and it looks like Indians from the reservation are responsible. Hoppy captures rustler Lone Eagle only to have him shot before he can talk. The Indians capture Hoppy thinking he was the killer. But Hoppy tells the Chief that Ranger Andrews is the rustler and probably killed Lone Eagle. If he can be allowed to retrieve Andrew's gun, the bullets will match.
Hoppy arives posing as an outlaw to avenge his brother's killing by Plunkett. After robbing a train and killing Plunkett, he gets to meet the boss known as the Lone Wolf and lead his next job. Seeking help from Stoneman to capture the outlaws, he realizes too late that Stoneman is the Lone Wolf and is captured.
Hoppy clears Lucky on a charge of bank robbery and foils the plot of a crooked lawyer to rustle a herd of pedigree cattle and take over the valley.
On a cattle drive Hoppy, camp cook Windy, companion Lucky, and young Artie Peters encounter an eccentric professor. The professor professes to be searching for the evolutionary missing link, but in reality he is a cattle rustler who uses his dynamite to scatter the cattle in order capture some of them.
The Army needs 500 horses and Hoppy has been sent to round them up. After he and his men do all the work, Carson arrives and plants ten of his branded horses among the group. Then he and his men arrest Hoppy and his crew for rustling and make plans to hang all of them and then sell the horses.
Lorna Drake arrives from England to take over the ranch. Although she and Hoppy argue most of the time she takes a liking for Hoppy, angering her fiance Ronald. This enables Scar to enlist Ronald's help in his plan to kill Hoppy. But when Hoppy foils that plan a forest fire develops endangering Lorna.
Hopalong Cassidy, boss of the BAR 20 ranch in Texas, rides down the New Mexico cattle country in response to an urgent message from his lifelong sweetheart, Nora Blake, who is in serious trouble. Before he, "Lucky" Jenkins and Pappy can reach her ranch, they are stopped by Clay Allison, a cattle-rustler who is in almost complete control of the district, and wants to extend his holdings by seizing Nora's cattle and driving her out.
Belle Starr has just returned from prison to take over her ranch where her foreman Ringo who is rustling cattle. He is after the herd and has planted his man Twister there. When Hoppy finds the cattle stampeded by Twister, he secretly marks them hoping this will lead him to the rustlers and their buyer.
Caldwell and Nixon have their men rob the stage and then critcize the Sheriff for not catching the robbers. With her father the Sheriff under pressure, Mary sends for Hoppy who finds the stolen money and sets a trap to bring in the entire gang.
Some years before, a vicious criminal and master of disguise known as 'The Fox' is captured by Rurales Colonel Gonzalez and Hoppy working undercover. When 'The Fox' escapes from prison, he vows to exact vengeance from the two lawmen. He lures Cassidy south of the border with a forged letter from Gonzalez and murders Gonzalez in cold blood. Aiding 'The Fox' in his plans is his sister Janet, to whom the chivalrous Hoppy finds himself attracted.
The local school is causing Hoppy problems. First Bar 20 cattle are stolen when Hoppy investigates a problem there. Then the new teacher arrives and disrupts the routine of the Bar 20 hands. Later with the Bar 20 hands at graduation, the rustlers are poised to strike again. But there is dissension among them and this will lead to the break that Hoppy needs.
Keller buys Marsh's cattle and then murders him to retrieve the money. But Ann Marsh remembered some of the serial numbers and this is the clue that Hoppy needs. He arrives posing as a dude. He also poses as a novice poker player and this brings in a few of the stolen bills. When he realizes Keller is the one he is after, he wins back all the money at the poker table. He escapes from Keller's saloon but Keller and his men head out after him.
Hoppy goes undercover as a gambler from the East when Bar 20 cattle are stolen by unknown rustlers. Brennan/Talbot are twin brothers (one a casino owner, the other a rancher) and Hoppy believes they provide alibis for each other while one is out committing crimes. Hoppy gets a job in the casino to learn more but is exposed when a gambling gunslinger notices him.
Town Marshal "Windy" Halliday sends for his old Bar-20 Ranch friends, "Hopalong" Cassidy and "Lucky" Jenkins, to help fight a gang of outlaws led by "Stiff-Hat" Bailey. Cassidy becomes interested in Mary Joyce, whose ranch is the main target of the Bailey gang. Things are complicated by the fact that Mary's husband, "Rusty" Joslin, and escaped convict, is tied up with the outlaws.
Having to herd their cattle over Buck Collin's land, the ranchers are building a railroad spur to avoid paying his fees. To stop them Collins has him men rob the stage of the payroll money and also disrupt the construction. But Hoppy has a plan. He lets the Deputy know when the stage will be robbed and then he robs that stage. Collins men try to rob him just as the Sheriff arrives. When Hoppy breaks them all out of jail he is accepted into the gang.
Hoppy and Lucky deliver cattle to Valdez in Argentina. Merritt is after Valdez's ranch and has his son and daughter killed, supposedly in an accident. Examining the bullet, Hoppy suspects murder. Hoppy then remembers Merritt and finds his picture on an old USA wanted poster.
Marshal Hoppy has been called in to investigate payroll robberies and arrives posing as Marvelo the mind reader. When Lucky arrives Hoppy has him pose as the expected Marshal. Hoppy works his way into the gang led by Ma Burton and sets a trap for them. But once again Lucky slips up revealing the masquerade and Hoppy finds himself a prisoner in a burning building.
European bad guy Baron Bendor leads some local townsmen in a plot to obtain horses through theft. Hoppy and his sidekicks Lucky and Speedy must find and expose the horse thieves.
Hoppy and Lucky confront a gang of outlaws which has been ravaging stagecoaches and gold mines. The final gunfight is at Ed Colby's mine.
Hoppy, Lucky and Speedy are driving a herd of mustangs to the town of Blue Sky, where they are to be delivered to Jeff Chapman, the owner of the Bar 20 stage line, when they come upon Jeff's runaway stage. The stage has just been robbed by Smiley and his gang of singing outlaws, who have shot Jeff and left him to die.
After receiving a call for help from California Texas Rangers, Hoppy and new sidekick California Carlson head to California to help out Lucky Jenkins against a tough gang of land grabbers.
Joe Weller has instigated a conflict over water rights between two ranchers. The idea is to have the ranchers do each other in then move in and take over. Hoppy and the good guys won't let this happen.
With the local vigilantes unable to combat the lawlessness, Forbes sends for Hoppy. Dry gulched on the way, Hoppy realizes the bad guys were tipped off and he, Lucky, and California arrive posing as bad men. Hoppy suspects Logan and sets up a silver shipment to trap him. When the silver disappears, Hoppy looks like a double crosser and is trouble. Not only has his identity been revealed sending gummen after him, but Lucky is about to be hung as an accomplice.
Hoppy, Lucky and California search for a mine owned by Trudy Pendleton after it was taken from her by the swindling gambler Ace Gibson. They find the mine and Hoppy fights Gibson over it.
Belle Langtry runs a town being taken over by cattle rustlers. She is also a front for the outlaws, who are led by Steve Fraser. Hoppy gets elected sheriff and cleans up the town with help from the Bar 20 boys.
Some Easterners intend to seize a tract of valuable timber land. Hoppy must try to stop them before they blow up a major dam.
A former Bar 20 cowhand is now a cattle rancher and having trouble with rustlers. Hoppy and the Bar 20 gang ride in and surround the the bad guys. June Winters joins the posse and serves as the romantic partner for posse co-leader Lucky.
Brent's cattle are being rustled and he has sent for Hoppy who arrives with California and Johnny. The three pose as dude English detectives but their identity is quickly revealed when they have to fight off the rustlers. When Hoppy and California finally find the rustler's hideout they also find themselves prisoners.
Hoppy and his pals accompany the Grants to Saudi Arabia to buy horses. When the Karitga's have El Kader kidnap Charles Grant for ransom, Hoppy engineers his rescue. When they return to the Sheik's camp, El Kader and his men attack.
The usual gang of bad guys is out to grab up all the available ranch land. This time their object is land belonging to Chinese. As an aside, Hoppy leads some archaeologists through parts of California.
Burton is after Clark's ranch. He gets the banker to refuse to renew Clark's note and then sends his men to rustle his cattle. Hoppy is Clark's new foreman and is on to Burton's scheme. But just as he learns of the rustling and is about to go after the gang, the Sheriff arrives and arrests him for hiding Johnny who has been accused of robbery.
Hoppy is sent for to see if he can find the outlaw gang working both sides of the border. The gang leader, sometimes dressed as Hoppy and sometimes as Gonzales, has the two sides suspecting each other. But finding an old wanted poster, Hoppy sets a trap.
Sheriff Hoppy has to find a way to bring the bad guys, headed by Tom Jordan, to justice in the Lone Star state. The problem is that they are hiding out beyond his jurisdiction, in Oklahoma.
In order to find out whether ranch owner Dan Slack might also be a cattle rustler, Hoppy gets a job on Slack's ranch. When he is discovered by Slack's crew, he is framed for murder.
While oil drilling, Hoppy and California discover an underground well - a potential threat to Jebb Hardin's monopoly on water in the region.
Mark Jackson has a scheme to get Adams' land. His gang robs Adams' fiancé of her jewels, robs Hoppy of his cattle money, and then gives that money to Adams to buy back the jewels in exchange for a deed to his land. But Lin recognizes the bills and Hoppy and his pals go after the robbers.
To obtain water rights, bad guy Mark Foster murders the heir to a cattle ranch and puts an imposter in his place.
Maxson and Trimble are using the Night Riders to scare the ranchers off their land knowing there is oil under the ground. Finding a wounded lawyer Corwin, Hoppy assumes his identity. But Sam Nolan knows Hoppy and when he arrives in town the masquerade is over.
Julie's husband has been murdered and land agents want her to sign away her property rights. Hoppy warns against this but she does so anyway. It looks as though she will be unable to deliver the timber called for in her agreement. Hoppy has to make the lumber deal happened and solve the murder.
After Hoppy helps round up the Trilling gang, Trilling breaks his men out of jail and they rustle the Bar 20 herd for revenge. When Hoppy gets the herd back, Trilling posing as a Marshal not only gets the herd again, he gets the Sheriff to jail the Bar 20 gang. Getting help from the Sheriff's daughter, Hoppy and pals start out once more after Trilling.
When he runs for sheriff, Hoppy is beaten by Jerry Doyle, the gutless wonder voted for by every crook in town. When Hoppy moves to have the new sheriff impeached, outlaw leader Tad Hammond hires forty gunslingers to stop him.
Hoppy, California and Lucky must rescue Mrs. Evans from the corrupt sheriff and his black-hatted gang of outlaws.
At the request of an army officer friend, Hoppy goes to retrieve the officer's deserter son from an outlaw enclave where he learns the son is being forced by the ringleader to take part in scam to take gold in cavalry disguise.
At the reading of his late cousin's will, California learns the estate will be divied among whoever remains of the seven relatives. With one already dead, another immediately murdered, and the Lawyer telling them the ranch is almost worthless, Hoppy investigates.
Sue Harmon gets Hoppy and his friends to join their expedition looking for Indian artifacts. Expedition leader Atwood makes a deal with nearby cattle rustler Morgan to loot the Indian treasures instead and sell them. Hoppy is on to their plan and pretending to leave follows them. Not only is he outnumbered by Morgan's men, but California has himself about to be sacrificed in an Indian ritual.
With a storm approaching, Hoppy and his pals take refuge in a church in an abandoned town, When Riker and his men arrive to tear the church down, Hoppy kicks them out. Riker then has the church surrounded and those inside find themselves prisoners.
Hoppy, California, and Lucky travel to Mesa City for a short vacation. California buys new clothes and carrying his old ones in a suitcase, bumps into escaping bank robbers in the dark. His suitcase gets switched with that of the robbers and he is seen with the money. Hoppy must find the money that has mysteriously disappeared and also the robbers so that he can clear California who is now in jail.
After receiving money for delivering a large herd, Hoppy, California, and Lucky retire to an inn for the night. The next morning both Lucky and the money are gone. At first Hoppy suspects Blaney and his gang but later realizes Doc Richards is responsible. He and his mysterious concoctions have put Lucky under a hypnotic spell and Hoppy and California set out to find him.
Hoppy, California, and Lucky arrive at an inn for Lucky's wedding only to find it called off as Lucky's fiancee's uncle is missing. He is found murdered and on each of the next two nights a man is found missing the next morning. All three stayed in the same room and Hoppy has lots of suspects.
Teacher Lola Blair is against building the saloon right next to her schoolhouse. When she is kidnapped, Hoppy rescues her and forces the saloon keepers to relocate.
A banker is trying to cheat people out of their silver-rich land. Hoppy learns that the banker is in league with an outlaw gang.
Hoppy is an agent of the federal government investigating the counterfeiting of both U.S. and Mexican money. His only clues are the name "Mordigan" and a drawing of a comet.
