Mordecai and Rigby have to remember all of their food challenges so that they can eat a 10ft sandwich.

Rigby and Eileen get called away to Don's black belt ceremony, forcing Mordecai and Margaret to hang out alone – and Mordecai to confront his feelings for Margaret now that he's single.

Rigby must borrow his dad's car and return it unnoticed so he can drive Eileen to his school prom.

Rigby must write a speech for his high school graduation that will be broadcast on national TV. Meanwhile, Mordecai sinks into a depression over how Rigby is now more successful than he is, and the park workers finally find out the true intentions of the dome experiment.