After Quality Comics went out of business in 1956, DC Comics acquired the rights to the Human Bomb as well as the other Quality Comics properties. The Human Bomb remained unpublished until he and several other former Quality properties were re-launched in "Justice League of America" #107 (October, 1973) as the Freedom Fighters. As was done with many other characters DC had acquired from other publishers or that were holdovers from Golden Age titles, the Freedom Fighters were located on a parallel world, in this case called "Earth-X" on which Nazi Germany won World War II. The team were featured in their own series for fifteen issues (1976-1978), in which the team temporarily left Earth-X for "Earth-1" (where most DC titles were set). The Human Bomb was then an occasional guest star of "All-Star Squadron", a superhero team title that was set on "Earth-2", the locale for DC's WWII-era superheroes, at a time prior to when he and the other Freedom Fighters were supposed to have left for Earth-X.