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

Russ Marin as Dr. Baranowski

Vernon Washington as Henry Lydell

John Dresden as Policeman

Roberto Contreras as Max

William Lampley as Young Man

Jeffrey Reese as Randy Morse

Valla Rae McDade as Camilla, Randy's girl

Ken Minyard as Ken Minyard, the sportscaster

Monica Peterson as Mrs. Lydell

Kathy Hilton as Shelly Warner

Philip Michael Thomas as Corn Rows

Ernest Robinson as Policeman

Angelo Rossitto as Angie (uncredited)

Kristephan Warren-Stevens as Crowd Protester