Ralph Byrd

饰：Lt. Terry Kent

贝拉·卢戈西

Bela Lugosi

饰：Boroff, alias M.A. Anderson

Maxine Doyle

饰：Jean Norman

理查德·亚历山大

Richard Alexander

饰：Thorg

Lee Ford

Lee Ford

饰：Snapper McGee

赫伯特罗林森

Herbert Rawlinson

饰：Cmdr. Boyle

John Picorri

饰：G.A. Rackerby

劳伦斯·格兰特

Lawrence Grant

饰：Rabinisi (Boroff's spokesman at screening)

托马斯·卡尔

Thomas Carr

饰：Ens. Jim Kent

Carleton Young

饰：Henchman Dodds [Ch. 4]

Allen Connor

Allen Connor

饰：Dick Norman

Ranny Weeks

饰：Wies (ambulance orderly thug)

罗伊·巴克罗夫特

Roy Barcroft

饰：Goebel, Henchman [Chs. 2, 10] (uncredited)

Earle D. Bunn

饰：Kelp Plant heavy [Chs. 8-9] (uncredited)

亚基马·坎纳特

Yakima Canutt

饰：(uncredited)

Ed Cassidy

饰：Patrol Boat Capt. Johnson [Chs. 1-3, 5, 12] (uncredited)

Jack Clifford

饰：Carver (uncredited)

Floyd Criswell

饰：Motorcycle heavy [Ch. 8] (uncredited)

Jack Daley

饰：Captain of the S.S. 'Carfax' [Ch. 1] (uncredited)

Leon Davidson

Leon Davidson

饰：(uncredited)

Forrest Dillon

饰：Sea Wolf thug [Ch. 7] (uncredited)

Lester Dorr

饰：Hospital radium tech [Ch. 11] (uncredited)

Curley Dresden

饰：Dock heavy [Chs. 6-7, 10] (uncredited)

罗伯特·杜德利

饰：Pierport station agent [Ch. 6] (uncredited)

弗兰克·埃利斯

Frank Ellis

饰：Kelp Plant worker [Ch. 8] (uncredited)

Frank Fanning

饰：Roadside police sergeant [Ch. 3] (uncredited)

Jerry Frank

饰：Sea Wolf thug [Chs. 3, 5, 7] (uncredited)

Lee Frederick

饰：Citizen [Ch. 3] (uncredited)

Audrey Gaye

Audrey Gaye

饰：Phone switchboard supervisor [Ch. 2] (uncredited)

Joseph W. Girard

饰：Cmdr. Green [Ch. 1] (uncredited)

Kit Guard

饰：Kelp Plant heavy [Chs. 8-9] (uncredited)

Henry Hale

Henry Hale

饰：Krohn (Morovanian scientist) (uncredited)

Jack Ingram

饰：Seaman [Chs. 2-3, 6-7] (uncredited)

Warren Jackson

饰：Boat heavy #4 [Ch. 5] (uncredited)

雷克斯·利斯

Rex Lease

饰：Coast Guard orderly [Chs. 1, 3] (uncredited)

Alexander Leftwich

饰：Froman, Morovanian emissary [Ch. 1] (uncredited)

Joe Mack

Joe Mack

饰：Captain of the S.S. 'Adamic' [Ch. 3] (uncredited)

Gene Marvey

Gene Marvey

饰：Blake (uncredited)

Frankie Marvin

饰：Sniper [Ch. 7-8] (uncredited)

Frank Meredith

饰：Policeman [Ch. 6] (uncredited)

James Millican

饰：Dock heavy [Chs. 6-7, 10] (uncredited)

Pat Mitchell

Pat Mitchell

饰：Radioman (uncredited)

金 莫哈韦

饰：Ambulance driver-thug [Ch. 3] (uncredited)

Edwin Mordant

饰：Dr. Meade [Chs. 6, 11] (uncredited)

Michael Morgan

Michael Morgan

饰：Coast Guardsman Moore [Chs. 3, 11-12] (uncredited)

Henry Morris

Henry Morris

饰：Dock heavy [Chs. 6-7, 10] (uncredited)

George Morvey

George Morvey

饰：Coast Guardsman Blake (uncredited)

Charles B. Murphy

Charles B. Murphy

饰：S. S. 'Adamic' Mate [Chs. 5-6] (uncredited)

John Mustin

John Mustin

饰：Policeman (uncredited)

Henry Otho

饰：Mate on the S.S. 'Carfax' [Ch. 1] (uncredited)

Eddie Phillips

饰：Boat heavy [Ch. 5] (uncredited)

Loren Riebe

饰：Pete, Thug [Chs. 5, 8] (uncredited)

Vinegar Roan

Vinegar Roan

饰：Dock heavy [Ch. 6-7, 10] (uncredited)

杰克·罗伯茨

Jack Roberts

饰：Jones, Racherby's lab assistant [Ch. 2] (uncredited)

Buddy Roosevelt

饰：Patrol Boat Lt. Scott (uncredited)

Dick Scott

饰：Gang launch pilot [Ch. 1] (uncredited)

Reed Sheffield

Reed Sheffield

饰：Thug loading launch [Ch. 11] (uncredited)

Dick Sheldon

Dick Sheldon

饰：Ambulance attendant-thug [Ch. 3] (uncredited)

Harry Strang

饰：Phone company code expert [Ch. 2] (uncredited)

Duke Taylor

饰：Loader [Ch. 6] (uncredited)

Tom Ung

Tom Ung

饰：Charlie, 'Sea Wolf' cook [Ch. 7] (uncredited)

Billie Van Every

饰：Phone operator [Ch. 2] (uncredited)

罗伯特·沃克

Robert Walker

饰：Black (a thug) (uncredited)

Frank Wayne

Frank Wayne

饰：Henchman Payne [Chs. 3, 5, 7-8, 10-11] (uncredited)

Herbert Weber

Herbert Weber

饰：Belden, Cargo Clerk-Thug [Ch. 5] (uncredited)

罗伯特·威廉姆斯

Robert Williams

饰：Sloan, Henchman [Ch. 8] (uncredited)

罗杰·威廉姆斯

Roger Williams

饰：Black, a Thug [Chs. 6-7, 10] (uncredited)

Dan Wolheim

饰：Sea Wolf Captain Slauson [Ch. 7] (uncredited)

Duke York

饰：Sea heavy #1 [Ch. 5] (uncredited)

George Chesebro

饰：L.H. Degado - Chief Thug [Ch. 5]