You will Watch The Venture Bros Season 1 Episode 13 online for free episodes with HQ / high quality. Stream cartoons The Venture Bros Episode 13 Return to Spider-Skull Island Dr. Venture has surgery to remove a tumor from his abdomen. Thinking that their father is pregnant, Hank and Dean run away from home and wind up in a Scared Straight!-style prison program led by The Monarch. The “tumor” turns out to be Dr. Venture’s twin brother, who has been living inside him since being devoured while the two were still in the womb. The twin attempts to claim his birthright by killing Dr. Venture, but is stopped by Brock and H.E.L.P.eR. After a truce, he takes the name Jonas Venture Junior and Dr. Venture gives him the X-2 and their father’s facility on Spider-Skull Island. The family recovers Hank and Dean, but they are accidentally killed by The Monarch’s henchmen.