Gage Petronzi

Gage Petronzi is a fictional character from Buffy the Vampire Slayer, played by Wentworth Miller in his first acting role in the Season 2 episode "Go Fish". He was a member of the Sunnydale High swim team who, along with his teammates, was transformed into a Gill-man by experimental steroids used by their coach. The character is remembered as an early, minor role for Miller, who later became famous for Prison Break.  Actor: Wentworth Miller  Episode: "Go Fish" (Season 2, Episode 20)  Role: A slacker on the swim team who gets turned into a fish-like monster.  Significance: It was Miller's first professional acting job, and he has credited the experience and casting director for helping launch his career.