Robert Knepper is an American actor. His career started in the 1980s. During his initial years, he had roles in the films That’s Life!, Wild Thing, and Made in Heaven. During the ’90s, he had notable performances in the movies Young Guns II, Search and Destroy, Everyone Says I Love You, and Phantoms. He then became more active on television the following decade. He starred as Special Agent Shue on Thieves and Tommy Dolan on Carnivàle. He later gained recognition for his role as Theodore “T-Bag” Bagwell on Prison Break. Following this, he played Samuel Sullivan on Heroes. In the 2010s, he played Roger Reeves /Billy Grimm on Cult, Sid Rothman on Mob City, Angus McDonough on iZombie, and Rodney Mitchum on Twin Peaks.