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 Lenny Venito Julian Pisano Guest Star Casey Siemaszko IAB Captain Pat Fraker Guest Star Anthony Mangano Officer Ed Laughlin Guest Star Scott Allan Campbell IAB Sgt. Jerry Martens Guest Star Alan Feinstein Lt. Shanley Guest Star Jay Leggett Michael Canavan Guest Star Maz Jobrani Dr. Zamir Shola Guest Star Nicholas Mele Anthony Solario Guest Star Seth Jaffe Vinny Prioli Guest Star Jon Huertas Juan Guest Star Les Brandt Jose Carrera Guest Star Donna Ponterotto Paula Bonfigli Guest Star Jane A. Rogers Victoria Golden Guest Star Gonzalo Menendez Mike Menendez Guest Star Joe Marinelli Gene Greaves Guest Star Thomas Mills Captain Billings Guest Star Kevin E. West Uniform 1 Guest Star Ralph Garman Uniform 2 Guest Star Eric Fleeks Joe Greco Guest Star Mark Tinker Executive Producer Bill Clark Executive Producer, Writer Stephen Adly Guirgis Writer Matthew Penn Director