George Harkness became the criminal known as Captain Boomerang who, in the original timeline, caused trouble for Barry Allen (Flash) by joining with other members of the Flash's Rogues Gallery to lure his opponent into the Flash Museum so that the Reverse Flash could set up bombs that would take out the Flash along with the Rogues Gallery members and the Flash Museum. Superman, Batman, Green Lantern, Wonder Woman, Aquaman, Captain Atom, and Cyborg showed up to help Flash deal with the Rogues Gallery and defusing the bombs before they detonated. Captain Atom took Cyborg and Captain Boomerang up into the sky so that Cyborg could use his bionic tendrils to hack into the bomb and defuse it before it detonated, thus saving the villain's life in the process.
- 1 Appearances of George Harkness (Flashpoint Paradox)
- 2 Images featuring George Harkness (Flashpoint Paradox)
- Quotations by or about George Harkness (Flashpoint Paradox)
- Character Gallery: George Harkness (Flashpoint Paradox)