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 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 Actor Austin Majors Theo Sipowicz Guest Star Chandra West Dr. Jennifer Devlin Guest Star Andre Kinney Michael Woodruff Guest Star Cyrus Farmer Craig Woodruff Guest Star Sara Ramirez Irma Pacheco Guest Star Gregory Alan Williams Agent Marcus Guest Star Mark Moses Andrew Moss Guest Star Tim Kelleher Ed Pisarchik Guest Star Mickey Toft Eddie Pisarchik Jr Guest Star Michael Silver A.D.A. Leo Cohen Guest Star Willam Dennis Hurley Stu Condell Guest Star Eugene Lee Ernest Stallworth Guest Star Rich Hebert Joe Murphy Guest Star Geoff Meed Pete Murphy Guest Star Jessalyn Gilsig Detective Kelly Ronson Guest Star Ralph Garman Officer Gruden Guest Star Norman Large Judge Guest Star Leslie Marshall Barbara Pisarchik Guest Star Abigail Rose Solomon Foreperson Guest Star Patrick Robert Smith Uniform 3 Guest Star Robert McLeod Court Officer Guest Star Mark Tinker Executive Producer, Director Bill Clark Executive Producer, Writer Matt Olmstead Executive Producer, Writer Nicholas Wootton Executive Producer, Writer