Take the BuddyTV Personality Quiz: Which Prison Break Character Are You? William Edward Fichtner began his acting career as Josh Snyder in As the World Turns in 1987. Fichtner's film credits include Contact, Heat, Armageddon, Go, Equilibrium, Black Hawk Down, and Crash. He is best known as a character actor, taking on supporting roles. Credited as "Bill Fichtner", he lent his voice to the character Ken Rosenberg in the popular video games Grand Theft Auto: Vice City and Grand Theft Auto: San Andreas. From 2005-2006, Fichtner also starred in the science fiction drama series Invasion as Sheriff Tom Underlay. After Invasion was cancelled, Fichtner was chosen to play Agent Alexander Mahone in the second season (2006-2007) of Prison Break.
Alexander Mahone was introduced as a new character in the premiere episode of the second season of the series. He plays a prominent role in the second season and has appeared in every episode so far. Mahone is 14-year veteran of the FBI. After Michael Scofield successfully orchestrated the escape of eight prisoners from Fox River Penitentiary, he was assigned to spearhead the task force assembled to bring in the fugitives.