Michael Imperioli is best known for his work as hotheaded mobster “Christopher Moltisanti” in The Sopranos, and since the HBO series wrapped he’s played a cop on the ABC show Life on Mars….and a cop on the upcoming ABC series Detroit 1-8-7 (premiering September 21st).  Imperioli breaks down the different between playing a criminal and a lawman in Detroit 1-8-7, which hopefully will last a bit longer than Life on Mars.