Watch Relentless (1989) HD Full Movie Free on SolarMovie. Watch Relentless (1989) online free. Two Los Angeles police detectives, cynical veteran Malloy and cocky rookie Dietz, hunt for a serial ...Two Los Angeles police detectives, cynical veteran Malloy and cocky rookie Dietz, hunt for a serial killer, an ex-cop named Taylor, who randomly chooses his victims from a phone directory.