When Mork babysits Mr. Caruthers' daughter, Louise, she accidentally gets transformed into a Cave Ork and disappears. As Mork and Mindy desperately scramble to find Louise, Hamilton makes his way to Mr. Caruthers to rat them out.

When Mork, Mindy and Eugene go to the circus, the evil ringmaster kicks them out and steals Mork's dog, Doing. The trio sneak back in disguised as clowns and mount a rescue for the Orkan pooch.

Orson instructs Mork to learn about love, so he gets some lessons from Eugene. Meanwhile, Mindy and Hamilton get cast in the school's production of Romeo and Juliet.

When his friends are too busy for him, Mork joins up with a gang of hoodlum bikers and unknowingly aids their crime spree.

Orson sends Mork an Ork-Man video game for his birthday, but when it breaks, Mork uses his finger to fix it and accidentally brings the termite-like characters into reality.

On the morning of the school's Halloween dance, Mindy and Hamilton are elected King and Queen, so Orson conjures up a witch to go with Mork. Unfortunately, Broom Gilda takes a shine to Hamilton and bestows him with magical abilities.

Mork helps Doing earn his way back in the house.

As Mindy prepares for a beauty contest, she notices a bug bite on her nose, so Mork uses his powers to heal it and accidentally turns her into a gorilla.

Mork splits himself into two people so he can simultaneously clean the McConnell's music store and attend Hamilton's party with Mindy. Unfortunately, one Mork's good, the other's evil, and it's the evil Mork who skips out to the party.

Mork prepared eggs for Orson which are filled with the essence of a variety of animals. At the annual Boulder Wild West Day, the rodeo animals unwittingly consume Orson's eggs and begin behaving uncharacteristically.

Orson sends Mork's parents to Earth when Principal Caruthers demands a meeting with them. Since Orkans age in reverse, they appear much younger than Mork, so a wealthy curmudgeon kidnaps them in hopes of finding the fountain of youth.

A rival football team steals Mork's magical eggs and feeds them to his own team so they'll perform poorly.

In an effort to retrieve Mork's watch stolen from a rat, Mork, Mindy and Doing shrink using a special device.

Mork drinks strawberry juice that makes him invisible, then takes advantage of his invisibility by trying to fight a bully to win Mindy's affections.