Season 1

Main Cast

 * David Caruso as Detective John Kelly
 * Dennis Franz as Detective Andy Sipowicz
 * James McDaniel as Lieutenant Arthur Fancy
 * Sherry Stringfield as Assistant District Attorney Laura Michaels
 * Amy Brenneman as Officer Janice Licalsi
 * Nicholas Turturro as Officer/Detective James Martinez

Recurring Cast

 * Sharon Lawrence as Assistant District Attorney Sylvia Costas
 * Gordon Clapp as Detective Greg Medavoy
 * Gail O'Grady as Police Administrative Aide Donna Abandando
 * David Schwimmer as Josh Goldstein
 * Robert Costanzo as Alphonse Giardella
 * Daniel Benzalli as James Sinclair
 * Luis Guzman as Hector Martinez
 * Michael Harney as Detective Mike Roberts
 * Wendy Makkena as Detective Sharon LaSalle
 * Michael DeLuise as Andy Sipowicz, Jr.