After this , he went on to have a recurring role in Stargate Universe in 2010 .
After Prison Break ended in 2009 , Knepper was cast as villain Samuel Sullivan in the fourth and final season of Heroes .
After this , Knepper went on to have a recurring role in Stargate Universe in 2010 .
After Prison Break ended in 2009 , Knepper was cast as villain Samuel Sullivan in the fourth and final season of Heroes .