At night the Mangler stalks the streets of Los Angeles, killing and mutilating random victims. On the trail are a TV reporter, the father of one of the victims, and a police detective, but despite their efforts only the mysterious psychic DeRenzy knows what the killer is and how to stop it.
William Devane
as Roy Warner, aka Steve Dupree
Cathy Lee Crosby
as Zoe Owens
Richard Jaeckel
as Det. Dave Mooney
Keenan Wynn
as Sherman 'Sherm' Moss
Warren J. Kemmerling
as Police Captain Speer
Biff Elliot
as Detective Jack Bresler
Jacquelyn Hyde
as De Renzy
Casey Kasem
as Police Pathologist
Vivian Blaine
as Cortney Floyd
John Bloom
as The Dark
Bill Derringer
as Herman Burmeister (as William Derringer)
Jay Lawrence
as Jim, the newscaster
