Harry Christos hailed from the planet Angor. Gifted with the power of super-speed, he joined with several other like-minded heroes and founded the Assemblers. The team's mortal enemies were the sociopath villains the Extremists who sought to destroy the world through nuclear Armageddon. The Assemblers fought against the Extremists, but Captain Speed, along with his teammate the Bowman, perished during the conflagration.
