US TV
The actor - Theodore 'T-Bag' Bagwell in Prison Break - will play the new lead villain on the NBC show.
Knepper has been cast as Samuel, a charismatic but evil character who will veer into the lives of all heroes.
NBC recently announced that Heroes will return in the Fall for an uninterrupted run of 19 new episodes.
Tube Talk
'Being Human', 'Homeland': Tube Talk Q&ATube Talk answers your questions about shows such as Touch and Raising Hope.
2012-13 Season
'Mistresses' US remake to air on ABCABC will air a remake of the British drama Mistresses next summer.
US TV Interviews
Randy Jackson on 'Idol' fainting, pressure: Q&AFive singers faint - and one falls off the stage - on most intense Hollywood Week yet.
US TV Ratings
'NCIS's 200th episode beats 'Glee'NCIS overpowers Glee, while The River stumbles on its debut.
