Alexander Mahone is a fictional character from the American television series Prison Break. He is played by William Fichtner. The character was introduced to the series 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 has been a Special Agent of the FBI, specializing in manhunts for escaped prisoners for 14 years. After the protagonist of the series, Michael Scofield (played by Wentworth Miller), successfully orchestrated the escape of eight prisoners from Fox River State Penitentiary, Mahone is assigned to spearhead the task force assembled to bring in the fugitives. He is 42 years old.