导演 Fred F. Sears

Dr. Russell A. Marvin 休·马洛

Carol Marvin Joan Taylor

Maj. Huglin Donald Curtis

Brig. Gen. John Hanley Morris Ankrum

Vice Adm. Enright Thomas Browne Henry

Gen. Edmunds Grandon Rhodes

Prof. Kanter John Zaremba

Frank the garage man Sydney Mason

Motorcycle cop 拉里·J·布莱克

Air Intelligence Command Officer Bert Stevens

Officer/Civilian at Military Conference Arthur Tovey

Major Kimberly Alan Wells

Military Officer at Experiment (uncredited) Nicky Blair

Military Messenger (uncredited) Jimmy Cross

Military Officer (uncredited) Jack Deery

Dr. Alberts (uncredited) Charles Evans

Military Official (uncredited) Raoul Freeman

Alien (voice) 保罗·费斯

Military Official (uncredited) James Gonzalez

Minor Role (uncredited) Duke Green

Military Official (uncredited) Ed Haskett

Sgt. Nash (uncredited) Clark Howat

Cutting - Generator Technician (uncredited) Harry Lauter

Minor Role (uncredited) Don Marlowe

Worker in Control Tower (uncredited) William Meader

Plane Passenger (uncredited) Sol Murgi

Military Officer at Experiment Forbes Murray

Radio Listener (archive footage) (uncredited) William J. O'Brien

Plane Passenger (uncredited) Murray Pollack

Tank Commander (uncredited) Mike Ragan

Maj. Kimberly (uncredited) Alan Reynolds

Man Crushed Beneath Wall (uncredited) Dale Van Sickel

Civilian Observing Saucer Attack (uncredited) Guy Way

Plane Passenger (uncredited) Bob Whitney

Alfred Cassidy Frank Wilcox

Chinese Radio Listener (uncredited) Beal Wong

Narrator (voice) (uncredited) William Woodson