Steven Bochco Creator, Executive Producer David Milch Creator 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 Jacqueline Obradors Det. Rita Ortiz Actor Currie Graham Lt. Thomas Bale Actor Bonnie Somerville Det. Laura Murphy Actor Bill Smitrovich Al Angelotti Guest Star Stanley Anderson Robert Heilbrenner Guest Star Joseph Sikora Det. Joe Slovak Guest Star Vince Corazza Det. Ray Quinn Guest Star David Brisbin Basil Greenhouse Guest Star John Thaddeus Dale St. John Guest Star Rosemary Forsyth Felicia Heilbrenner Guest Star Keone Young Akira Nikada Guest Star James Martin Kelly Chief Duffy Guest Star Richard Portnow Howard Segal Guest Star Gwendoline Yeo Ai Watanabe Guest Star Danica McKellar Rosemary Wyatt Guest Star Maureen Muldoon Ann Marie Sullivan Guest Star Bruce Locke Johnny Nikada Guest Star Patty McCormack Jeannie Wyatt Guest Star Robert Silver Pat Wyatt Guest Star Edward Carnevale James Fitzgerald Guest Star Dan Ziskie Inspector Dowdell Guest Star Jeff Austin Christopher Perkins Guest Star Ralph Garman Uniform Guest Star Billy Concha Uniform Guest Star Rubin Knight Doorman Guest Star Mark Tinker Executive Producer, Director Bill Clark Executive Producer William M. Finkelstein Executive Producer, Writer