The Venture Bros.

Past Tense (1x11)

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When Brock and Dr. Venture are kidnapped from the funeral of a college friend, the boys enlist the aid of the original Team Venture: a group of superscience adventurers who worked for their grandfather in the sixties. Meanwhile, the mysterious kidnapper reveals the secret of his twenty year old grudge through a series of flashbacks to when he, Brock, Doc, Baron Underbheit and Mr. White were all in college together.