James Michael Imperioli (born March 26, 1966), commonly known as Michael Imperioli, is an Emmy-winning and Golden Globe Award-nominated American actor. He is perhaps best known for his role as Christopher Moltisanti on The Sopranos. He also appeared as Det. Ed Green's temporary replacement, Det. Nick Falco, in the popular TV drama series Law & Order. Imperioli has been cast in the US version of Life on Mars. His character is described as a "rough, tough sexist who has never heard the phrase "politically correct"."