Doctor Faustus (Johann Fennhoff) is a supervillain appearing in American comic books published by Marvel Comics. The character is depicted usually as an adversary of Captain America. An Austrian psychiatrist and criminal mastermind who employs psychological manipulation of his enemies, the character was created by writer Stan Lee and artist Jack Kirby, and first appeared in Captain America #107 (November 1968). Johann Fennhoff appeared in the first season of the Marvel Cinematic Universe TV series Agent Carter, portrayed by Ralph Brown.