Knepper has signed on to become the lead villain in the fourth season of the NBC series, which will premiere in the fall. For at least six episodes, he will play Samuel, the character referred to as "Carnival Barker" in previous releases. He'll be charismatic, all right, but he'll be evil, like every other villain. The character will possess a wickedly twisted sense of humor, and he is expected to peek into the lives of all the heroes.
The guy we used to know as T-Bag--the supremacist who's flipped side more often than anybody else in Prison Break, but ended up returning to jail after a failed attempt to bow down to the Company--is set to start shooting Heroes, with the rest of the cast, later this week. The series is set to return for its fourth season on NBC this fall.