Double Date Detentionaire : Season 2 Episode 4

While trying to talk to Biffy about his birthday party, Lee ends up following him with Brandy, Holgar, and Greta, who are having a date, in tow. Lee and Brandy find Biffy at a building whose logo resembles the symbols on the materials used in the prank. Biffy turns out to be visiting his parents, who own the building. Lee has no other choice than to find out what happened to the Amazing Finnwich.