The Venture Bros. and the Curse of the Haunted Problem.When the computer systems of VenTech Tower are infected by a mysterious computer virus, Dr. Venture tasks Billy and White with tracking down the source of the problem. Meanwhile, Hank's burgeoning relationship with Sirena is threatened by the intervention of her father Wide Wale, who wishes to keep an outsider away from his family. In order to get closer to Sirena, Hank revives his old persona Enrico Matassa and asks to join Wide Wale's syndicate. Wide Wale decides to offer him a chance to join, but asks Hank to first prove himself by killing the Blue Morpho, who has been captured by Wide Wale's organization. Dean requests Orpheus, the Alchemist and Jefferson Twilight come to New York to try and help solve the problem in the tower, but they are unable to make much progress with their supernatural approach. An offhand comment about the virus by Billy causes the original Team Venture to rush to VenTech Tower, where they reveal the horrifying truth to Dr. Venture — the ProBLEM Light from Gargantua-1, which was recovered by J.J. and placed in VenTech Tower as a decorative piece, contains the remains of Jonas Sr.'s body and has been maintaining his life over the decades he was believed to be dead; Jonas is the source of the "virus." Just as Dr. Venture is reunited with his father, a disturbed White breaks in and smashes some of Jonas's mechanical organs, causing Jonas to go on a rampage.