When Billy scares Mallory enough to make her consider moving out of town, Spencer must try and convince her to stay.
To raise money, Spencer turns the mansion into the Billy Joe Cobra museum, but runs into problems when Billy Joe becomes annoyed by the guests.
Spencer runs into trouble when he takes advantage of Billy by tricking him into doing his homework.
Spencer has to make sure everything in his house is normal when he's faced with expulsion for being weird.
Spencer runs into trouble during the school's Talent contest.
Billy helps Spencer find a date to the Shorty Awards.
Billy turns Spencer into a ghost.
Billy feels neglected when Spencer pays more attention to a new videogame than him.
Spencer tries to become more popular by being a sports star so people will notice his films.
Spencer has to find a way to save his reputation when he's forced to direct a biography of Principal Ponzi.
When Billy's ectoplasm contaminates Spencer's goldfish it mutates into a piranha that the two must dispose from the family pool.
Spencer has to find a way to get rid of Kleet after Jessica develops a crush on him.
Hoover pretends to be a fan of Billy in order to capture him.
Spencer pretends to be an accomplished director in order to get a big time movie producer to hire him.
Spencer's attempt at a kung-fu movie goes awry when he casts Kleet as the villain.
Spencer uses a blob of gum mutated by Billy's ectoplasm in his new movie, but has to stop it when it begins expanding and swallowing everything in sight.
Spencer throws a birthday party for Rajeev on Billy's private jet.
Spencer lies to Billy in order to attend a pop star's concert and hang out with Mallory.
Spencer has to prove to his parents that he is responsible enough to stay home alone.
Spencer tries out for the school's wrestling team in order to avoid being put in Principal Ponzi's aerobics class.
Spencer and Billy team up to make a music video but their creative differences quickly lead to them turning against each other.
Billy's ectoplasm-smeared fur coat turns Spencer into a werewolf, and it's picture day at school.
Spencer cooks up a scheme to get Ponzi fired, but the new principal turns out to be even worse.
When Spencer arranges for Billy's former pet miniature crocodile to be brought home from the zoo, the pet turns out not to be miniature at all - and has it's sights set on Hugh.
When Lolo runs for class president, promising to put Spencer and his friends in a loser trailer if she's elected, Spencer has no choice but to run against her.
When Spencer has to compete against Lolo to sell the most candy for charity, he makes the mistake of accepting Billy's help, with hilarious but disastrous results.
When Billy unwittingly turns a vintage Billy doll into a voodoo doll, then Ponzi get's a hold of it, bad things start happening to Billy.
Billy helps Rajeev win Lolo's affection by teaching him one of his songs which has amazing love powers. Things go wrong when Lolo accidentally hears Spencer singing it instead.
When Billy discovers that Madame X is no longer interested in capturing him, as she's moved onto healthier pursuits, he goes on a desperate search for a new obsessed fan.
Spencer convinces his family to be on a reality show, thinking it will be good publicity for his movies, but is unpleasantly surprised to find the show's producer is Lolo.
When Spencer stands up to Lolo and unwittingly becomes the new "king of the school", he finds that power corrupts.
Another ghost, who's a huge Billy fan, shows up at the mansion to hang out with his idol, and won't take no for an answer.
Spencer makes a deal with a famous Hollywood publicist in order to gain exposure for his movies, but has to rescue Billy when she ends up capturing him.
When Billy hears how popular pro-athletes can be he possesses Kleet's body to try and get some fame, but his egotistical on-field antics land him in huge trouble.
Billy clones himself in order to finish a new song quickly, but when he and his clones spend the whole time goofing off, Spencer has to find a way to get the song finished or risk being labeled a fraud.
Spencer tries to sneak into the Fame Awards to see his movie idol win after Ponzi sentences him to after-school detentio
Spencer loses his necklace and can't see Billy anymore, but still has to find a way to stop Hoover when his parents decide to hire a ghost hunter.
Spencer turns the mansion into a huge haunted house for a Halloween contest, but when Billy accidentally merges with the house, it becomes a real horror fest.
Hugh takes Spencer and Rajeev into the desert for a camping trip, but the boys' plan to shoot a horror movie there goes awry when Billy's ectoplasm turns Hugh into a real monster.
Spencer has to save everyone in his school when Billy's ectoplasm-filled cologne turns them into love-happy zombies.
Spencer has to find a way to keep his summer job as head towel boy at the Beverly Beach Club when Ponzi tricks him into driving away all the guests.
Rajeev turns into a merman after Billy adds some ectoplasm to his muscle cream, and a jealous Spencer attempts to steal some of the resulting spotlight for himself.
Spencer gets accepted into the Beverly Film Academy, but enlists Lolo, Kleet, and iStevie's help in retrieving his transcript when Ponzi locks it up in a high-security vault.
Spencer has to protect Billy at school when Hoover poses as a new substitute teacher, but gets some additional help from Principal Ponzi.
When Spencer encourages Billy and Rajeev to keep each other company while he's away, the two become best buddies and make Spencer feel like the odd man out.
Hugh becomes coach of the Beverly Beverly High cheer squad and when he's injured passes the job on to a reluctant Spencer.
Spencer tries to get Ponzi to pursue his lost dream of being a great ribbon dancer, in the hope that he'll quit his job and leave Spencer in peace.
Spencer, Rajeev and Shanila wake up in the middle of the night at a school-sponsored sleepover, with no memory of the night's events and Billy missing.
Billy gives Spencer a magical hat that allows him to gain confidence. When everyone overhears about it, they'll stop at no cost to get the hat from whomever possesses it.
When some of Billy's ectoplasm gets soaked into Principal Ponzi's wig, It causes it to become evil, and it's up to Billy and Spencer to get rid of it.
When Hugh reminds Spencer that their family tradition, known as Wrightmas, starts today, Spencer is desperate in attempts to hopefully not participate in the event.
Billy fears that he'll lose his hair. In attempts to prevent it, he uses a hair machine which causes side effects to turn him evil.
