- HD 1080
- Runtime: 92m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: William Lustig
- Stars: Judd Nelson, Robert Loggia, Leo Rossi, Meg Foster, Patrick O'Bryan
- keywords: serial killer, police officer, dead woman
- Production_studio: Out of the Dark Productions, CineTel Films, New Line Cinema
- Slogan: Killers aren't born. They're made.
- The Relentless is featured in the top rankings of 1989
- #59 in Top Crime Movies of 1989
- #58 in Top Thriller Movies of 1989
- #19 in Top Mystery Movies of 1989
- #47 in Top Horror Movies of 1989
Two Los Angeles police detectives hunt for a serial killer who randomly chooses his victims from a phone directory.
