Ep 25. The Gap Behind The Dumpster

Atticus decides to start a secret club with Rory, but after Rory invites everyone else to join, Atticus gets cross. Atticus insists on making strict rules for the club, but when everyone keeps breaking them, he loses his temper and kicks everyone out. It's only when he's all alone that Atticus remembers he actually hates strict rules himself, and he goes off to find his friends.