James Michael Imperioli (born March 26, 1966) is an American actor and television writer. He is known for his role as Christopher Moltisanti on The Sopranos, for which he won the Primetime Emmy Award for Outstanding Supporting Actor in a Drama Series in 2004. He also appeared as Det. Ed Green’s temporary replacement, Det. Nick Falco, in the TV drama series Law & Order. Imperioli spent the 2008-2009 television season as Detective Ray Carling in the US version of Life on Mars. He was starring as Detective Louis Fitch in the new ABC police drama Detroit 1-8-7 until its cancellation.