Complete story — includes the ending
Rusty returns from a trip to Japan being followed by an oni. The boys are kidnapped by Myra Standish, a woman who claims to be Rusty's former bodyguard and the boys' mother. She happens across Rusty and kidnaps him as well, forcing Brock to rescue them. Kindly villain advisor Dr. Henry Killinger accosts The Monarch and takes over and improves the Cocoon, convincing 24 to side with him. 21 goes to Dr. Girlfriend for help, who fights her way to The Monarch, only for Killinger to reveal he set things up so they could make amends. Post-credits scene: Killinger summons the oni, planted by him to reunite Myra and Rusty, and commends it for at least indirectly helping the boys to be rescued.
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