Kyra Sedgwick Deputy Chief Brenda Johnson Actor J.K. Simmons Asst. Chief Will Pope Actor Corey Reynolds Sgt. David Gabriel Actor Robert Gossett Commander Taylor Actor G.W. Bailey Det. Lt. Provenza Actor Anthony John Denison Det. Lt. Andy Flynn Actor Michael Paul Chan Det. Mike Tao Actor Raymond Cruz Det. Julio Sanchez Actor Phillip P. Keene Buzz Actor Mary McDonnell Captain Sharon Raydor Actor Jon Tenney Special Agent Fritz Howard Actor, Director Deirdre O'Connell Liz Provenza Guest Star Sunny Mabrey Audrey Rangel Guest Star Jayson Blair Paul Woods Guest Star Ilia Volok Viktor Guest Star Reg Rogers Jerry Cooper Guest Star Ralph Gifford Writer Carson Moore Writer