The Venture Bros Season 6 Episode 5 Tanks for Nuthin' Episode Title:Tanks for Nuthin'.Episode Description:Continuing from the previous episode, Dr. Mrs. the Monarch investigates the death of Harangutan and discovers the Blue Morpho's role, though she doubts Billy's belief that the hero exists. The rest of the Guild tasks her with delivering the news of his death to Harangutan's widow, a supervillainess known as Battleaxe. Meanwhile, while trying to deal with the fallout of the God Gas scandal, Dr. Venture is arched by his latest nemesis, a criminal genius known as Think Tank who is also Dean's college professor. Think Tank attempts to engage Venture in a game of chess, only to fail when he learns Venture does not play the game. Brock fights Think Tank and is shot off the building, only to be saved by Warriana, who assists him in destroying Think Tank's armor. Elsewhere, Dr. Mrs. the Monarch travels to an impound yard with Battleaxe to retrieve her late husband's "Harangutank", only to run into the Monarch and 21, who are retrieving the Morpho Mobile in their disguises. She is unable to identify them, but gives chase when they escape. Battleaxe then discovers Dr. Mrs. the Monarch laptop showing surveillance of Harangutan's death and begins driving to the Venture building to avenge her husband when she believes Venture is the Blue Morpho. A series of events results in Battleaxe colliding with Think Tank and driving into the hole where Harangutan died, wounding Think Tank and Battleaxe. Dr. Mrs. the Monarch sees the Morpho Mobile fly over the Venture building but then loses sight of it; when Venture looks over the side of the building, she believes he is the Blue Morpho. She returns home and apologizes to the Monarch for her recent actions, declaring that she knows who her true enemy is.