Complete story — includes the ending
Rusty falls into the compound's bunker, and when Brock follows him, he gets stuck in a room with the minuscule Paul Entmann, a former friend of Jonas's that has been trapped in the room for thirty years by the hostile artificial intelligence M.U.T.H.E.R.. Rusty encounters a group of sycophants who worship recordings Jonas left for Rusty in case of an apocalypse. When Pete and the Order try to investigate, M.U.T.H.E.R. demands to talk to Jonas or else she will launch a nuclear missile hidden under the compound. Entmann explains that the kids were being given a tour of the bunker with Team Venture when M.U.T.H.E.R. went haywire and tried to seal them all inside, resulting in him being trapped in the room and the kids to be stuck in the bunker. Rusty flees from the now-adult kids and clings to the top of the launching missile, only for it to malfunction due to them using it as a toilet. Post-credits scene: Rusty seals the bunker. To satiate M.U.T.H.E.R., Brock and Entmann play one of Jonas's recordings on a loop for her.
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