It's a No-Brainer (S05E05)

Following his defeat in the rehearsal math-a-thon to Buster, Brain resolves to pursue a fresh path as a comedian. He believes it's time to pass the torch to Buster, envisioning him as the next Brain. This shift sparks a new chapter for both of them, as Brain embraces his comedic aspirations while entrusting Buster with the responsibility of carrying on his legacy.