David Milch Creator Steven Bochco Creator, Executive Producer Dennis Franz Det. Sgt. Andy Sipowicz Actor Mark-Paul Gosselaar Det. John Clark, Jr. Actor Gordon Clapp Det. Greg Medavoy Actor Charlotte Ross Det. Connie McDowell Actor Henry Simmons Det. Baldwin Jones Actor Bill Brochtrup John Irvin Actor Garcelle Beauvais-Nilon A.D.A. Valerie Heywood Actor Jacqueline Obradors Det. Rita Ortiz Actor John F. O'Donohue Sgt. Eddie Gibson Guest Star Scott William Winters Detective Stan Hatcher Guest Star Trevor Wright Charles Slocum Guest Star Derek Webster Calvin Parker Guest Star James Colby Ed Boyanovich Guest Star Mel Winkler Lonnie Parker Guest Star Michael Peña Wilmer Lopez Guest Star Lyndsy Fonseca Madison Bernstein Guest Star Jeremy Guskin TARU Tech Guest Star Mark Tinker Executive Producer Bill Clark Executive Producer, Writer Nicholas Wootton Executive Producer Matt Olmstead Executive Producer Tom Szentgyorgyi Writer Steven De Paul Director