Complete story — includes the ending
The Monarch launches an attack on Spider-Skull Island, but the Cocoon is damaged by J.J.'s giant "Ventronic" robot. While The Monarch realizes that, through Guild law, he can attack Rusty as revenge as long as he survives the fight, J.J. calls the O.S.I., who sends agents Cardholder and Doe, as well as Brock. Cardholder and Doe drug the captain, which gets him addicted to tranquilizer. They authorize The Monarch's death because of him repeatedly killing his arches, and J.J. decides to use the island's death ray. The Monarch sends 21, 24, and the hyper-competent henchman 1 to the island to perform subterfuge, where he successfully sabotages the island's wiring. While the Cocoon speeds towards the island, J.J. prepares to fire the death ray and 1 trips the alarm system, causing Brock to attack him. J.J. fires just as The Monarch closes in. Post-credits scene: 21 and 24, sitting on the island's dock, receive a call from The Monarch, who reveals that their infiltration was so they could hack the island's video feed and make it appear that the Cocoon was coming at the island. He declares that they are going to attack Rusty.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of The Venture Bros. episodes. HTML formatting and reference markers removed. · Content license