MacDonald "Mac" Gargan is a fictional character appearing in American comic books published by Marvel Comics. During his career as a villain of Spider-Man's, the character originally appeared as the most well-known incarnation of Scorpion, was later bonded with the symbiote to become the third incarnation of Venom, and eventually takes a serum to control the symbiote to pose as the third incarnation of Spider-Man during the "Dark Reign" storyline.