Zeljko Îvanek played Steve Atwood. He is perhaps best known for his Emmy Award winning role on Damages (also starring Glenn Close), as well as his starring roles on The Event (with Laura Innes) and Madam Secretary, and his recurring roles on Homicide: Life on the Street (starring Reed Diamond) and Heroes (starring James Kyson Lee) the first season of 24 and Oz (starring J.K. Simmons).