After David fools the twins with a bald-faced lie, they turn the tables on the ""master of practical jokes"" by convincing him that his hair is falling out. Meanwhile, Michael chokes under the pressure of retaking his driver's test.

A nervous Michael dives into the dating pool bu doesn't make much of a splash, while David will stop at nothing to avoid immersing himself in an English assignment.

David has a crisis of conscience when he's attracted to the coed that best friend Burt has his eye on, but he's caught off guard when Burt throws down the gauntlet.

David lights a fire under his brothers to get them to help sweep out the chimney, but Mark does a slow burn when he gets wedged inside the fireplace.

Mark worries that he and his two left feet will trip over the light fantastic when Willie tells a girl that Mark likes, that Mark is a great dancer.

Sandy tries to teach Willie a lesson about cigarettes, but her efforts go up in smoke when she returns to smoking herself.

It's a dream come true for psychology student David when Sandy, ""Queen of the All-Nighters,"" agrees to be the guinea pig for his sleep deprivation experiment.

Sandy thinks she's hired ""Robo-Secretary"" after Mrs. Poole whips the entire school into tiptop shape. Meanwhile, Michael fends off the advances of an admirer.

Willie is stirred by first-hand accounts of apartheid from Sandy's South African professor, so he and Mark embark on an el-train ride to a candlelight vigil.

Mark and Willie are barely able to contain themselves when they spot a nude portrait of Sandy hanging in an art gallery.

Tired of being ""dull and predictable,"" Mark turns into a mini-James Dean, but his cool attitude only gets his family and friends hot under the collar.

David and a pretty student get off on the wrong foot, and they continue to bicker when they're fixed up on a blind date that could wind up opening their eyes to romance after all.

Love-struck David's girlfriend, Sara, receives a great job offer in Australia, so David decides to take the plunge and propose marriage, but Sandy and Michael think he's all wet.

David, Burt and Rich wager they'll have a wild weekend in Las Vegas, but they don't bet on ending up in jail. Meanwhile, Mrs. Poole displays some unusual talents.

Sandy and Michael endure twice the torture on a ""double date"" with the perfect prospective mates, while David decides to spend the evening bonding with his brothers.

David chafes under the Hogan house rules, so he moves into an apartment with Burt and Rich, who make Felix and Oscar seem like ideal roommates.

The numbers 4 and 0 add up to a midlife crisis for Michael, and Sandy only multiplies his distress when she throws him a surprise birthday party.

David puts himself in the penalty box over his guilt about injuring an opponent in a hockey game, and Mark threatens to body-check Willie for not paying a debt.

Willie wants to teach Mark a lesson in brotherly love when Willie's girlfriend decides she likes her tutor Mark better.

It's amore at first sight for David when Sandy's friend arrives from Italy to stay with the Hogans.