Dobie's teenage cousin Duncan moves in with the Gillises and tells Dobie's girlfriend that Dobie needs help for a drinking problem.

A chemical concoction makes Maynard irresistible to women.

Dobie falls in love with a girl at school, but family tradition prevents her from marrying until a match can be found for her older sister.

Dobie is the new DJ on the college radio station. A mobster tries to give him payola to make his country-singer girlfriend a star.

Maynard saves a suicidal jumper but falls from the ledge himself and is taken to a psycho ward.

Dobie names Thaila as his beneficiary on a life insurance policy, then becomes paranoid that she and Maynard are trying to kill him.

Staying overnight at the Osbourne mansion with Dobie and his new girlfriend, Maynard is suspected of stealing jewelry from their safe when he is found sleepwalking.

Dobie joins the football squad to impress a girl, but only succeeds in making her big bruiser boyfriend jealous.

Dobie pretends to be terminaly ill to gain a girl's sympathy. However, due to a mixup, Dobie is led to believe he's really in poor health.

To cure Maynard of his childish belief in Santa Claus, Mr. Gillis climbs down the chimney on Christmas Eve and gets stuck.

When a foreign student likes Dobie because he is simple-minded, Zelda decides to teach him how to improve his memory

An older woman teaches Duncan how to be rotten to succeed in the world so he'll be able to provide for her younger sister. But meanwhile the younger sister is falling for nice, honest Dobie.

A fugitive criminal and his girlfriend hold up the Gillises in the store. Maynard arrives and complicates the situation.

Thrown out by his mother, Chatsworth moves in with the Gillises for a while.

Zelda is tired of being rejected by Dobie, while Maynard realizes that no other woman would put up with him.

On a trip to Washington DC with the Gillises, Maynard gets mistaken for a rocket scientist and sought by foreign spies for his secret fuel formula.

Desperate for date money, Dobie figuratively sells his soul to Chatsworth and agrees to fix the outcome of a $5,000 charity raffle.

Duncan and Maynard don't realize they loaded up the Gillis Grocery delivery truck with a case of nitroglycerin.

When Chatsworth's family goes broke, he gets Maynard and Duncan to help him raise money claiming it is charity for a needy family.

Mrs. Gillis's cousin Virgil visits and gets the Gillises to supply him with all he needs for a singing engagement.

Chatsworth pays Dobie to take his place at a fancy dinner with old friends of the family, whose daughter he remembers as being particularly ugly.

A teenage celebrity's dog is lost and Dobie tries to find it.

Maynard temporarily gains super-strength. Mr. Gillis becomes his prize fighting manager.

Dobie and Maynard train a mynah bird to help them with their history exam.

Dobie falls for a kitchenware heiress and wants to impress her by selling one of the man's Quickie-Cookers.