Robert Fuller Dr. Kelly Brackett Actor Julie London Nurse Dixie McCall Actor Bobby Troup Dr. Joe Early Actor Kevin Tighe Roy DeSoto Actor Randolph Mantooth John Gage Actor Ron Pinkard Dr. Mike Morton Actor Tim Donnelly Firefighter Chet Kelly Guest Star Michael Norell Captain Hank Stanley Guest Star Marco López Firefighter Marco Lopez Guest Star Mike Stoker Firefighter Mike Stoker Guest Star Jack Webb Executive Producer Chris Nyby Director