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 Bill Brochtrup John Irvin Actor Henry Simmons Det. Baldwin Jones Actor Garcelle Beauvais-Nilon A.D.A. Valerie Heywood Actor Charlotte Ross Det. Connie McDowell Actor Esai Morales Lt. Tony Rodriguez Actor Joe Spano Det. John Clark Sr. Guest Star Lenny Venito Julian Pisano Guest Star John F. O'Donohue Det. Eddie Gibson Guest Star Austin Majors Theo Sipowicz Guest Star Stan Cahill Asst. Dist. Atty. Don Harrison Guest Star Casey Siemaszko IAB Captain Pat Fraker Guest Star Elmarie Wendel Susan Hornby Guest Star Jacqueline Obradors Actor Mike Sabatino Officer Martelli Guest Star Anthony Mangano Uniform #5 Guest Star Rick Pasqualone Uniform 1 Guest Star Henry Murph Hank Guest Star Mark Tinker Director, Executive Producer Bill Clark Executive Producer, Writer Matt Olmstead Writer Jody Worth Writer Nicholas Wooten Writer Harold Sylvester Writer Nicholas Wootton Writer Jake Paltrow Director Steven DePaul Director Donna Dietch Director Mark Piznarski Director Stephen Adly Guirgis Writer Peter Markle Director Craig Zisk Director Nelson McCormick Director