David Milch Creator 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 Jacqueline Obradors Det. Rita Ortiz Actor Currie Graham Lt. Thomas Bale Actor Bonnie Somerville Det. Laura Murphy Actor David Caruso Detective John Kelly Actor Amy Brenneman Janice Licalsi Actor Vincent Guastaferro Sgt. Vincent Agostini Actor Sharon Lawrence ADA Sylvia Costas Actor James McDaniel Lt. Arthur Fancy Actor Gail O'Grady Donna Abandando Actor Nicholas Turturro Detective James Martinez Actor Jimmy Smits Det. Bobby Simone Actor Kim Delaney Diane Russell Actor Ricky Schroder Det. Danny Sorenson Actor Andrea Thompson Det. Jill Kirkendall Actor Ralph Garman Actor Steven Bochco Executive Producer Mark Tinker Executive Producer Bill Clark Executive Producer