Judd Nelson plays Arthur 'Buck' Taylor, a dedicated detective determined to catch a serial killer.
Robert Loggia portrays Bill Malloy, a character involved in the intense investigation led by the protagonist.
Leo Rossi takes on the role of Sam Dietz, a detective on the hunt for a dangerous criminal.
Meg Foster plays Carol Dietz, a character entangled in the suspenseful storyline of Relentless.
Patrick O'Bryan portrays Todd Arthur, adding depth to the cast of characters in the movie.
Ken Lerner brings Arthur to life in Relentless, contributing to the gripping narrative.
Mindy Seeger embodies the character Francine, bringing her own touch to the ensemble of the film.
Angel Tompkins takes on the role of Carmen, a character who adds intrigue to the unfolding plot.
Beau Starr plays Ike Taylor, a role that adds layers to the story being portrayed in Relentless.
Frank Pesce portrays Marra, a character that contributes to the suspense and drama of the movie.
Lou Bonacki appears as Desk Sergeant, a character who plays a part in the investigation led by the protagonists.
George Buck Flower takes on the role of Old Man, adding a unique element to the cast of Relentless.
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