Smart Guy
S01E05: Lab Rats
When Mo and T.J. are teamed up by their biology teacher to observe animal behavior, T.J. decides they'll watch his brother Marcus and sister Yvette.
Overview
T.J. is a boy genius who gets bumped up from the fourth grade to high school. T.J. tries to adjust to his new life, but he shares some classes with his 14 year-old brother Marcus, the school jock, and his clueless and self-absorbed 16 year-old sister Yvette.
Episodes
S01E02 The Code
In the opener, T.J. has trouble learning the ropes outside the classroom and pays the price for breaking ""The Code,"" which states you never rat on a friend. The friend in question is Mo, a...
S01E03 Brother, Brother
Two twin sisters move to the school. Marcus gets a date with the pretty cheerleader, but unknowingly mistakes her for her smart twin later. As he realizes how much he likes them both, Marcus sets...
S01E04 Don't Do That Thing You Do
When the keyboard player in Marcus' band breaks his finger, T.J sits in. Meanwhile, Yvette is mortified when her friend admits having a crush on her dad.
S01E05 Lab Rats
When Mo and T.J. are teamed up by their biology teacher to observe animal behavior, T.J. decides they'll watch his brother Marcus and sister Yvette.
S01E06 A Little Knowledge
T.J. earns a spot on the game show Knowledge College in the hope that his winnings will help defray household expenses, but the pressure may be too much.
S01E07 Baby, It's You and You and You
Yvette is convinced T.J. is dying to go to the prom, despite his protestations, so Floyd gets him a date -- then Marcus gets him a date -- then Yvette gets him a date....
Cast

Tahj Mowry
T.J. Henderson

John Marshall Jones
Floyd Henderson

Jason Weaver
Marcus Henderson

Omar Gooding
Morris L. 'Mo' Tibbs

Essence Atkins
Yvette Henderson