Tired of being called perfect and on the edge of boring, Susie tries to go "bad." Her efforts, however, fall short of notice until she completely changes her style. To prove her "badness" Brianna challenges Susie to climb to the top of a dangerous tall old abandoned building to recover some sneakers hanging from the edge of the top floor.
The rats are up in the Finster attic searching for Halloween costumes when they discover a carving of a heart and the initials "T.P. + K.P." in the heart. Everyone immediately questions Tommy who claims he doesn't know anything about the heart. Chuckie believes Tommy at first but becomes suspicious of him.
Tommy has procrastinated on his science project, a mouse maze and it is now due in just a few days. Chuckie promises to help Tommy since he did an amazing job on the same project the year before. But when Chuckie finds out that his all time favorite comic book super hero, Armadillo Dave, is going out of print he is too distraught to help.
Tommy and Rachel break up because Rachel's family is moving away. Surprisingly, Tommy feels okay. His friends, however, are convinced that Tommy is in denial and they go over board trying to help Tommy cope with his grief.
Fed up with the annoyance that cell phones cause at school, Kimi decides to start a petition to ban cell phones. Angelica, an avid cell phone lover, decides to start her own counter petition, but no one will sign it because no one likes Angelica. She decides to make Chuckie the poster boy for her campaign. Angelica's dirty tactics go too far and cause Kimi and Chuckie to hate each other.
Dil has gotten a hold of a one of kind, reportedly real alien autopsy tape. He and the gang can't wait to watch it, but their plans are impinged upon when both Grandpa Lou and Grandpa Boris decide to baby-sit them. The two grandfathers end up arguing the entire time and dragging the kids into it.
Sick of her family acting like zombies, Didi decides to get rid of all the TVs in their house. Tommy and Dil are distraught over this; as are their friends when their parents also decide to get rid of their televisions. Tommy encourages his friends to try and have fun without TV in order to show their parents that they can handle it. But it is proving very hard to do.
Tommy breaks his plans to go the Big Ball Game with Grandpa, so Grandpa decides to take Dil instead. Upon seeing how well Dil and Grandpa are getting along, Tommy worries that he is being replaced as favorite grandson. On their annual fishing trip with Grandpa, Tommy challenges Dil for position as favorite grandson.