Plot summary
The Monarch calls his remaining henchmen, 21 and 24, and orders them to assemble a new team, which they source from a bad neighborhood. Rusty finishes restoring the boys' brains and they go to the mall. Dr. Girlfriend and Phantom Limb go to the same mall and The Monarch follows them. He tries to win Dr. Girlfriend back but gets distracted when 24 notices the Ventures, and she rejects him after realizing he cares more about his grudge than her. The henchmen kidnap Rusty and the new men overthrow the Monarch and lock him up with 21, 24, and Rusty.
Dr. Girlfriend helps the boys steal Brock's car and has Hank drive her to the Cocoon, while Phantom Limb helps Brock break into the Cocoon, believing The Monarch took Dr. Girlfriend. Unaware that Phantom Limb and Brock have massacred the henchmen, the imprisoned group sneak into 21's old room and arm themselves with his collection of memorabilia, opening the door to fight their rescuers. Post-credits scene: Dr. Girlfriend confirms that the brutalized Monarch is still alive and convinces Phantom Limb not to kill him. Brock insults her and Phantom Limb tranquilizes him.
Credits
Adapted from Wikipedia contributors, List of The Venture Bros. episodes. HTML formatting and reference markers removed.