After the war, Jack continued as a superhero in the UK. By the 1960s, he was helping a group called Unit D fight several menaces. After working to stop a British weapon of mass destruction, the Hurricane, in the early 1980s, Jack quit being a superhero. It has only been recently that Jack has come back as a superhero, fighting alongside Q, Commander Hawkes of the now defunct Unit D, Tom Tom the Robot Man, Becky Burdock: Vampire Reporter, and others.