Knepper promoted to 'Heroes' regular

WENN

Robert Knepper has been promoted to series regular on NBC's Heroes, according to The Hollywood Reporter.

The actor - famous for his role as Theodore 'T-Bag' Bagwell in Prison Break - had originally signed for just six episodes, but now joins the show's regular cast.

Knepper recently revealed to DS that he based his character Samuel on a young Keith Richards.

Heroes will return to NBC for an uninterrupted run of 19 new episodes on Monday, September 21.