Malcolm's plan to sabotage Dewey's entry test to the Krelboyne school for the gifted backfires when he is diagnosed as mentally disturbed.
While Celia deals with her cancer in her own unique way, Andy starts a business to rival Nancy's, and soon needs a pot-smoking lawyer to rescue him.
James Sterling convinces the team to help him steal a nuclear-reactor component from a skyscraper during a chess tournament but they soon realise he has an ulterior motive.
Joe invites friends Nate and Gillian over with their new baby in the hopes of convincing Mel that the time is right to start a family. Meanwhile, Lennox sets Zander up with her friend Lilah, and Ryder announces his future plans.
Mel learns the true reason why Joe is unsupportive of Dani's musical talents. Meanwhile, Lennox pressures Zander to make a choice.