An alien who flees the Andromeda galaxy because of a fatal malady caused by super-powered beings there. Coming to Earth, he assumes the identity Andrew Meda but finds that Superman's powers have the same deadly effect on him. Believing that Steve Lombard is Superman, he tries to eliminate him but the Man of Steel is able stop the plan (Act No. 460/1, Jun 1976: "Superman, You'll Be the Death of Me!"; Act No. 461/1, Jul 1976: "Kill Me or Leave Me!").
Still desperate to remove the presence of Superman and save his life, Karb-Brak uses an amnesia device and traps Superman in the year 1776, where he believes he is Clark Kent, apprentice of Benjamin Franklin. When his memory clears, Superman is able to return to the present and save Karb-Brak's life, by resurrecting him after his apparent demise (Act No. 462/1, Aug 1976: "Super-War of Independence!"; Act No. 463/1, Sep 1976: "Die Now - Live Later!"). Brak is able to assume the identity of Andrew Meda once again.