Richard Belzer Det. John Munch Actor Giancarlo Esposito Agent Mike Giardello Actor Peter Gerety Det. Stuart Gharty Actor Clark Johnson Det. Meldrick Lewis Actor Yaphet Kotto Lt. Al Giardello Actor Toni Lewis Det. Terri Stivers Actor Michael Michele Det. Rene Sheppard Actor Kyle Secor Det. Tim Bayliss Actor Jon Seda Det. Paul Falsone Actor Callie Thorne Det. Laura Ballard Actor Andre Braugher Frank Pembelton Actor Barry Levinson Executive Producer Tom Fontana Executive Producer