Dave Pomeroy

Howard Duff

Dr. Paula Stevens

Linda Cristal

Hal Johnson

Steve Franken

Dick Blaine

Mike Farrell

Albert

Stanley Clements

Reporter

Rush Williams

Information Clerk

Eilene Janssen

Lt. Brady

Wesley Lau

Karl Sinden (Mr. X)

George Sawaya

James Kincade

Stephen McNally

August Best

Nehemiah Persoff

Myra Pryor

Anne Jeffreys

Dr. Paul Cerbo

Oscar Beregi Jr.

Steadman

Gregory Morton

Goff

Dennis Hopper

Ernest

George Barrows

Dr. Milton Becker

John Hoyt

Director

Eddie Davis

Writer

Charles E. Savage

Producer

Earle Lyon