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 Esai Morales Lt. Tony Rodriguez Actor Jacqueline Obradors Det. Rita Ortiz Actor Austin Majors Theo Sipowicz Guest Star Chandra West Dr. Jennifer Devlin Guest Star William Francis McGuire Brad Cutshall Guest Star Mark Ivanir Ilya Antropov Guest Star Richard Kline Barry Driscoll Guest Star Brandon Keener Tim Semple Guest Star Allan Rich Vasiliy Choushkin Guest Star Jane Lynch Susanna Howe Guest Star Brooke Bloom Katie Driscoll Guest Star Ray Proscia Dan Markov Guest Star Joseph La Rocca Uniform Captain Guest Star Mark Bennington Lowell Guest Star Bob Jesser Bomb Squad Tech Guest Star Gina Morelli Teresa Guest Star Ray LaTulipe Josh Astrachan Guest Star Joe Sabatino Uniform 2 Guest Star Andre Marcellous Desk Sergeant Guest Star Amanda Rose Guest Star Mark Tinker Executive Producer Nicholas Wootton Executive Producer, Writer Bill Clark Executive Producer Matt Olmstead Executive Producer, Writer John Hyams Director