Allie campaigns against the wearing of G-strings in high school, and a sexy new teacher awakens a hidden gift in Brian.

Brian hides his gift for math to avoid his friends' reactions and Allie goes out to a nightclub.

It is Thanksgiving at New Garden Hills Valley! On the menu: turkey, cranberries and sibling sexual tension!

Allie skips school to buy her first G-string, and Mister Brown disguises himself as a clown to give Ryder hope.

Quinn unravels the mystery that no one cares about: what happened to Ashley Winterbottom?

Keith holds auditions for the film about his life. Allie has fun ruining her life and Brian gets dumped.

Allie forgets about the Harvard President's visit. Brian must win a match to free Miss C from the loony bin.

Allie and her father swap bodies for 24 hours and realize the challenges of their respective lives.

On the eve of their first sex romp, Allie tells Brian that she is a virgin and she has never had sex.

While Brian toys with the idea of running off with Miss C, Allie has a vision of what her life would be like without a baby.