He also appeared on MTV’s The Challenge from 2003 to 2004. Giuntoli’s acting debut came in the TV series Ghost Whisperer in 2007. He also appeared in episodes of Veronica Mars, Nip/Tuck, and Grey’s Anatomy. David had recurring roles in Privileged and Eli Stone and appeared on The Unit, Without a Trace, Cold Case, Crash, and Private Practice. His movie debut came in 2009’s Weather Girl and he has also starred in 6 Month Rule and Caroline and Jackie. Starting in 2011 Giuntoli has played Detective Nick Burkhardt in the NBC series Grimm. David auditioned for the role of Superman/Clark Kent in Man of Steel.