Season 1, episode 4.
The plot section contains spoilers.
Stacey tells Tommy she just wants to be friends, and Tommy reluctantly agrees. Stacey regrets her decision when in biology class Tommy partners up with the attractive Carole Lefevre, a new foreign exchange student. Merton discovers she's a catwoman and is a threat due to their intense jealousy. Carole and Stacey end up fighting in the school gymnasium, but Tommy breaks it up. In the end, Stacey renews her relationship with Tommy.