The Xtacles, led by Jack Taggart, are a private, freelance army of crime fighters on a flying aircraft carrier, the Xcalibur. Other members of the group include A.L.E.X., Xcalibur's holographic on-board AI, young Joseph Bigsby and U.S. President Stan. The Xtacles' attempts to complete their missions are usually futile as the group is catastrophically incompetent.