Negahban also had two collaborations with another Iranian-American Actress Mozhan Marnò in the TV series The Unit and the movie The Stoning of Soraya M., where he plays the husband of Soraya (Marnò). In 2008, Negahban voiced the insane Doctor Challus Mercer in the survival horror game Dead Space. Negahban also appeared as the main antagonist in the critically acclaimed TV series Homeland. In 2011 he won the Best Actor Award for the 2009 Iranian short film, Liberation at the Noor Iranian Film Festival, and in 2012, he returned to serve as an official festival judge.