Mork's boss, Orson, assigns Mork to study the planet Earth and, shortly after landing in the woods near Boulder, Colorado, he meets Mindy McConnell. Back at Mindy's apartment, she discovers that Mork is an alien, and offers to help him study Earth. In a flashback sequence, Mork tells Mindy about a previous visit to Earth when Fonzie arranged a date for him with Laverne.
Mork continues his story about his date with Laverne. When Mindy's father, Fred, discovers that Mork had moved in with Mindy, Deputy Tilwick offers to scare Mork off. Tilwick believes Mork is insane and tries to have him committed.
After constant hounding from Fred, Mork agrees to move out of Mindy's apartment. But Mork's plans are complicated when he becomes drunk on ginger ale.
Realizing that his living with Mindy is making it difficult for her to date, Mork decides to move out. While looking for a flop house, he stumbles upon Exidor, the delusional leader (and only tangible member) of 'The Friends of Venus'
When Mindy tells Mork that he has to experience love in order to understand the human experience, he takes her advice and falls head over heels for the lovely Dolly, oblivious to the fact that she's a mannequin.
A new customer at the music store turns out to be Mindy's old rival, Susan, who promptly sets her sights on Mork, as revenge for Mindy stealing her boyfriend back in high school.
Mork has a run in with Clint Mullet, a reporter for a tabloid that is offering $25,000 for proof of alien life. After Fred saves Mork's life, Mork decides to turn himself in to pay for Fred's plumbing bills and Mindy's college tuition.
When Mork tricks Mindy into believing that he can predict the weather, Mindy tells him that he should never lie. The music store's despicable landlord, Arnold Wanker, dies while trying to evict Fred from the music store. Mork, hearing the family try to comfort his widow, assumes that that Wanker is their friend, and brings him back from the dead.
Mork is jailed for freeing an escaped convict who's captured at the music store. Exidor begins worshiping O.J. Simpson.
When Mindy is reunited with her ex-fiance, she wonders what it would be like to raise a family, while Mork wonders what it would have been like to have had a mother. Mork kills two birds with one stone by using his Orkan Age Machine to regress himself to 5 years old.
Mork meets a bully who wants to dance with Mindy but Mork is opposed to violence. Humility is Mork's weapon.
Happiness and loneliness haunts us all. Mork activates his time machine to age himself to be a companion to Mindy's grandmother after she feels all her friends have passed.
Mork learns about Christmas, and his thoughtful gifts are unforgettable.
Mork meets an Immigrant from Russia and Mindy teaches Mork about democracy. An illegal alien has a new meaning for Mork.
Mork and Mindy get a new neighbor and invite him to dinner, where Mork cooks.
Mork performs a wedding ceremony to marry his friend Eugene and his girlfriend.
Mork and Mindy vacation in a cabin in the woods.
Mork tells Mindy that he's been transferred to another planet and will be leaving in a few days.
Mork wants to know more about where babies come from. A man offers to sell him one.
A kiss from Mindy brings out Mork's suppressed emotions.
When Mindy goes away for the weekend, Mork and Mr. Bickley go for a night out at a singles bar.
When Mr. Bickley steals Mork's age machine, he unknowingly causes Mork's age to change from that of a baby to middle aged.
Mork's attempt to find a new job is complicated by his 'birthday', a potentially fatal condition that causes him to behave stranger than usual unless he recharges himself with his egg-like 'gleek'.
When Mork inadvertantly costs Mindy a potential job, he decides to return to Ork. Orson then shows him what would have happened to Mindy over the last year had Mork not been there.
Mork gets a pet caterpillar which he names Bob.
Mork shrinks after taking a cold capsule.
While shrunk, Mork finds himself in an odd world.
To keep excitement in his relationship with Mindy, Mork starts fights with her and then wants to kiss and make up.
Due to a misunderstanding about Monopoly money, gold-digger Kathy believes Mork is rich, and claims she is carrying his child.
Working as a security guard in a science museum, Mork befriends a robot.
After Mork and Mindy are hired as campaign workers by Mindy's cousin who's running for city councilman, they end up competing for the same job.
Mork discovers he is allergic to Mindy, when he has uncontrollable fits of laughter (the Orkan equivalent to sneezing) around her.
On Halloween, Mork and Mindy believe the house she grew up in is haunted.
While in the hospital, Mindy is mistakenly scheduled for brain surgery.
When Nelson receives threatening phone calls, Mork and Mindy investigate a shady club.
Mork is romanced by another alien.
Mork is threatened by another alien.
Mork becomes a cheerleader for the Denver Broncos, making him pro football's first male cheerleader.
Exidor wants to propose to a meter maid and asks Mork for help.
Mork goes on a secret mission for the Air Force.
Exidor's mother shows up and tries to keep him from getting married.
When Mindy's dad visits with a younger woman he has just married, Mork is happy, but Mindy is not.
Mindy is targeted by a bigoted fanatical group.
When Mr. Bickley's blind son comes to visit, Mork learns to see the world differently.
Needing a vacation, Mork gets Orson's permission to swap bodies with other aliens.
Mindy secretly writes for a newspaper's lonely hearts column and unknowingly gives advice to Jeanie, who then falls for Mork.
Mork could be deported, unless he marries an American or finds someone to adopt him.
Mork recruits his friends to turn the hour devoted to Nelson's 7am, Saturday morning campaign speech into a variety show for kids.
Mork thinks he is a priest when he dresses in a black jacket and white collar, and begins advising church parishioners.
When Mork becomes addicted to advertising, he becomes a 'buy-a-holic', causing problems for Mindy.
When marital problems plague Mindy's father, he turns to Mork and Mindy for help.
Mindy's efforts to make Mork act like a normal earthling backfire, radically changing his personality. Orson sends the most respected Orkan elder to Earth to help Mork regain his Orkan traits.
The Elder (whose name is actually the sound of 'blowing a raspberry') converts the attic to a typical Orkan house, hoping it will help Mork revert to his old Orkan ways.
Mork discovers that his penpal is living at an insane asylum, and believes that he is Peter Pan.
When Wheels, the owner of the daycare center, announces plans to level the building, Mork challenges him to a skate-off through the city of Boulder.
Mindy teaches Mork about practical jokes, but Mork doesn't quite get the hang of pranks. After a disastrous prank, Mindy moves out to live with Glenda for awhile.
Mork kidnaps a chimp from the zoo, saying he was being treated badly. Exidor investigates at the zoo and learns that the chimp's mother was rushed to the hospital.
Mork dresses up as his favorite hero, Squellman the Yellow. One boy at the day care idolizes Billy the Kid and starts immitating him in a dangerous gam, so Mork and Mindy teach him a lesson about violence.
Mindy's dad wants to get plastic surgery to look younger. When he says everyone could use a little improvement, it inspires Mork to go to a plastic surgeon. His make-over surprises everyone.
An insurance salesman scares Mork about dying from natural disasters. He seals himself into a glass bubble in the living room.
Mork becomes a vagrant in order to help Mindy open a children's hospital.
Mindy applies for a job at a TV station. After speaking her mind to the station manager, she get hired. A blizzard keeps newscasters from getting to the station, so Mindy has to do the whole news show herself, with help from Mork.
Mindy has a broken record player that the repairman won't fix for a second time. Mork and Mindy want to get revenge on the repairman, so Mork puts him on trial before a jury of broken appliances.
Mork is beside himself when he hears that Xerko is coming from Ork to visit him. Xerko turns out to be an arrogant and egotistical man who wants Mork's job of reporting back to Orson. Xerko and Mork duel to see who will get the job.
Robin Williams is in town and Mindy can't get an interview. Mork doesn't think he looks anything like Robin Williams, but he gets chased by a mob of fans. Mork gets Mindy and himself into Robin Williams' dressing room, leading to a face-to-face interview with him.
Mindy goes away for the weekend, and Mork goes crazy missing her. The Orkan elder comes to visit and regrets that Mindy isn't there. He tries to clone Mindy, but each clone is worse than the last.
Mindy tells Mork she thinks they should date other people. He takes lessons from a swinger named T.N.T. and turns into a party animal.
Remo fires Ruby, the pregnant singer of the restaurant's band. Mindy takes in Rick and Ruby then tries to convince Remo to rehire them.
Fred's successful, but domineering brother, Dave, comes to dinner. Mindy accidentally eats an Orkan dessert which makes her behave strangely. Things get even worse when Uncle Dave eats some of the same dessert.
Grandma Cora comes to visit, but the trip takes a turn for the worse when she gets mugged. Mork conceives a plan to get even with the muggers.
Mork learns about gossip after Mindy gets her own gossip show.
Mindy is working a lot and Mork can't adjust, so they switch places for a morning to see how the other feels.
At Mr. Bickley's 50th birthday party, everyone shares what they regret in their life. Mindy makes excuses to put off her turn, but after everyone leaves, she shares her regret with Mork.
After decorating the apartment with flowers, Mork gets down on his knee and proposes to Mindy. Choosing between logic and her emotions, Mindy tells him that she cannot marry him. Mork asks for 24 hours to get her to change her mind.
Orson forbids Mork to marry Mindy because marriage is outlawed on Ork. Because Mork goes ahead with the wedding anyway, Orson turns him into a dog.
Mork and Mindy take their honeymoon on Ork, but Mindy becomes a tourist attraction. Things keep going wrong and Mork doesn't understand Earth honeymoon customs. He confesses to Mindy that he's scared of being married.
Exidor determines that Mork is pregnant and eventually gives birth to an egg via his navel. Mindy has trouble accepting that in the egg is their child. The egg hatches a full grown, elderly man as their baby.
Mearth learns to walk and talk, but calls Mindy 'shoe'. Mindy starts avoiding Mearth until Mork gives her an opportunity to bond with her son.
Mork becomes insecure when he thinks he doesn't have Mearth's respect. Mearth finds Mork's spacesuit and Mork wears it as a superhero costume. Mork and Mearth go to a bar, looking for some bad guys and they find more than they bargained for.
Mork accompanies Mindy to her high school reunion and gets upset when Mindy associates with an old boyfriend. Mork then attempts to go back in time to the prom and do away with the boyfriend.
Mork turns to Exidor for money advice, but then invests all the family's money in Exidor's boutique.
When Mork and Mindy tell Mearth he's an alien, he gets upset, runs away and is captured by a cult of Utopians. Mork and Mindy pretend to be part of the cult to rescue him.
Mearth wants to go to school and gets sent to school on Ork, but he comes home crying because the other kids made fun of him and he hates the teacher. Mork and Mindy take Mearth back to class and Mearth uses his parents as a show-and-tell item.
Mearth is allowed to have some of his Orkan friends over and Zelka ends up spending the night. Mork and Mindy explain the facts of life to Mearth when they assume something happened between him and Zelka.
Mearth goes on a trip with Fred so Mork and Mindy have a week to spend alone together. They find that without Mearth at home, they have nothing to talk about. After they have a fight, Mork takes Mindy to the place they first met.
KTNS station manager, Mr. Sternhagen gets fired by his new and very young boss. The boss holds a party to meet all the employees' families, but a short circuit switches Mork's mind with Mearth's.
Mindy is tired of coming from work and then having to go out on errands in the evening. Mork goes to a driving school where TNT is his instructor and, after he takes his driving test, Mork thinks his examiner is the devil.
Mork has been making boring reports to Orson, so Orson erases all of Mork's memories of his family. Mindy and Mearth do everything they can to get Mork to remember them.
Mork uses Orkan components to assemble a home computer named M.I.L.T. MILT is so sophisticated and tyrannical that it decides to hold its creator, Mindy and Mearth, as hostages.
After hearing about how Rumplestilskin spun straw into gold, Mork and Mearth try to make polyester into gold. Mindy dreams that they become millionaires and live in a mansion with servants.
Mindy gets jailed when she won't reveal a source for one of her stories. Mork tries to go through political channels to get her out but, when he tries to spring her out, he too gets arrested.
Mork and Mindy are overjoyed when they meet Kalnik, an alien from Neptune who has also married an Earthling. Things go awry when they become suspicious of Kalnik's true intentions.
After the evil Kalnik bombs their apartment, leaving them on the run, Mork, Mindy and Mearth decide their only chance of surviving is to go public about Mork's real roots.
Kalnik discovers Mork, Mindy and Mearth in their demolished apartment, so Mork clicks the heels of his magic shoes in an effort to escape with Mindy to Rome. But the shoes have been damaged, and Mork and Mindy wind up with prehistoric tribesmen in a cave.
Mork bucks hard for a promotion from Orson and unintentionally comes up with a report on how to stay happily married on Earth.
