Dr. Exidor determines that Mork is pregnant. Mork gives birth to an egg via his navel. Mindy has trouble accepting that in the egg is their child. The egg grows and hatches a full grown, elderly man as Mork and Mindy's 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 boyfirend. Mork then attempts to go back in time to the prom and do away with the boyfriend and he succeeds. When Mork comes back to reality Mindy then assures him that he is the only one she loves.

Mork turns to Exidor for money advice, and invests all the family's money in Exidor's boutique.

Mork and Mindy tell Mearth he's an alien. Mearth gets upset and runs away. He's captured by a cult of Utopians and 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. Mearth 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 which gains the respect of his classmates.

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.

Mr. Sternhagen, the station manager where Mindy works, gets fired. KTNS's new boss is very young and ready to fire people. He holds a party to meet all the employees' families. 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. When Mork takes his driving test, he 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. Mindy finally breaks the memory dam by kissing him.

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. Then he tries to spring her out, but gets arrested himself.

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 has bombed 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. 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 an Okus cave.

Mork bucks hard for a promotion from leader Orson on planet Ork, and unintentionally comes up with a report on how to stay happily married on Earth.