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.
