Relentless IV: Ashes to Ashes
Directed by	Oley Sassone
Written by	Phil Alden Robinson Mark Sevi
Produced by	Paul Hertzberg (executive producer) Russell D. Markowitz (producer) Catalaine Knell (co-producer) Leo Rossi (co-producer)
Starring	Leo Rossi Famke Janssen Colleen Coffey
Cinematography	Russ Brandt
Music by	Terry Plumeri
Distributed by	CineTel Films
Release date	December 21, 1994 (1994-12-21)
Running time	95 minutes
Country	United States
Language	English

Relentless IV: Ashes to Ashes is a 1994 crime thriller film directed by Oley Sassone. The tagline was: "This time nothing can stop the fear." Relentless IV was filmed in Los Angeles, California. This is the fourth and to date final installment in the Relentless series.

Synopsis

Detective Sam Dietz (Leo Rossi) must yet again find and stop another serial killer who kills women in ritualistic executions. Detective work for Dietz is tough, as he has to juggle two women. One of them is his new female partner Jessica (Colleen Coffey), and the other is psychiatrist Sara Lee Jaffee (Famke Janssen) who holds the key to the case.

Cast

• Leo Rossi as Det. Sam Dietz
• Famke Janssen as Dr. Sara Lee Jaffee
• Colleen Coffey as Det. Jessica Parreti
• John Scott Clough as Martin Trainer
• Christopher Pettiet as Cory Dietz
• Ken Lerner as Al Rosenberg
• Loring Pickering as Det. Keller
• Lisa Robin Kelly as Sherrie
• Rainer Grant as Victim #1 Hairdresser
• Charlene Henryson as Victim #2 Deaf Woman
• Claudette Roche as Victim #3 Grocery Shopper
• John Kelly as Apartment Neighbor
• John Meyers as Murder Suspect

Home media

The film was released directly to videocassette on December 21, 1994. In 2006, Image Entertainment released a double feature DVD of this and the previous third film, in widescreen.

Other films in the series

• Relentless (1989)
• Dead On: Relentless II (1992)
• Relentless 3 (1993)