That's MISTER Sherman to You!

Cast (in order of appearance): Andy, Andy's dad, Socrates, Calvin, Sherman, Hobbes, Caesar, Edgar Sinclair, Genius Duck, Genius Boy, Genius Dog, Genius Cat

Summary
When Sherman is invited to a genius convention, he forces Calvin, Hobbes, Socrates, and Andy to come with him.

Full plot
Andy is sent to get the mail, and in the process, sees Calvin chasing a laughing Socrates down the road. Sherman comes up to see the mail, and sees an invitation to The Genius Society, a local genius convention. He decides to invite Calvin and the gang, with the dealbreaker of refreshments at the event. Sherman says he invited them because he has hope he can civilize the gang. Calvin says he's gonna show off his inventions. The five go to the library, where the event is. Hobbes begins a public feud with a lion named Caesar. Andy befriends a British inventor named Edgar Sinclair. Calvin and Socrates have some refreshments, and Calvin tries to find an invention to show off. He eventually shows off a Transmogrifier Gun, gaining the attention of a genius cat. Sherman notices Calvin is overshadowing him, showing off his inventions. Calvin tries to talk to Sherman as Socrates picks up a mountain of refreshments. Edgar Sinclair and a genius dog and duck ask about the Duplicator technology, and Sherman calls them out for inventing things for money. With that, the group goes home, but not before Calvin knocks out Caesar. They go back to Andy's house and Socrates shares his snacks with them.

Transcript
That's MISTER Sherman to You! Transcript

Trivia

 * The episode had a lot of guest stars, which include:
 * Kieran Culkin as Andy's dad
 * Andy Serkis as Caesar
 * Russell Brand as Edgar Sinclair
 * Joel McHale as the Genius Duck
 * Ian Cho as the Genius Boy
 * Adam Brody as the Genius Dog
 * Rosario Dawson as the Genius Cat