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.

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

On a class trip to an African jungle, Dobie is captured by a tribe of cannibals.

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

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

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

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.

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.

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

Maynard and Duncan accidentally lock Mr. Gillis in the meat freezer, and think they've killed him.

To avoid failing an upcoming test that will cause him to flunk out of school, Maynard drinks a potion that is supposed to turn him into a genius, but ends up transforming him into a monster.

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

Duncan gets a role in a visiting production of William Tell and falls for a young opera star, unaware she has a jealous boyfriend.

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

Performing at Pryor College, the Lettermen hire Dobie as an emergency replacement singer.

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

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.

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.

Dobie falls for brainy a Russian ballerina and solicits Zelda's aid to improve his grades. When that fails, he ends up dancing outside her window.

Maynard and Herbert get struck in one of those finger toys just as Mr. Gillis is about to leave for a grocer's convention.

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

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

The song-analyzing qualities of a computer are transfered to Maynard, and cousin Virgil uses his ability to predict hit songs to become a singing star.

A test chimpanzee is doomed unless Maynard can show that he is more talented than he seems.