约翰·艾加尔

John Agar

饰：Prof. Clete Ferguson

洛丽·纳尔逊

Lori Nelsom

饰：Helen Dobson

约翰·布罗姆菲尔德

John Bromfield

饰：Joseph Hayes

内斯特帕瓦

Nestor Paiva

饰：Capt. Lucas

格兰丁·罗德

Grandon Rhodes

饰：Jackson Foster

戴夫·威洛克

Dave Willock

饰：Lou Gibson

罗伯特·威廉姆斯

Robert Williams

饰：George Johnson (as Robert B. Williams)

Charles Cane

饰：Police Captain (as Charles R. Cane)

Loretta Agar

饰：Woman on Boat (uncredited)

瑞科·布朗宁

Ricou Browning

饰：Gill Man, The Creature (underwater) (uncredited)

Diane DeLaire

饰：Miss Abbott, chimp trainer (uncredited)

Mike Doyle

Mike Doyle

饰：Cop (uncredited)

克林特·伊斯特伍德

Clint Eastwood

饰：Lab Technician (uncredited)

Jack Gargan

饰：Skipper (uncredited)

Charles Gibb

Charles Gibb

饰：Cop (uncredited)

布雷特·哈尔西

Brett Halsey

饰：Pete, teen killed by Gill-Man (uncredited)

唐·C·哈维

Don C. Harvey

饰：Joe's Searchlight Partner (uncredited)

Tom Hennesy

Tom Hennesy

饰：Gill Man, The Creature (on land) (uncredited)

Don House

饰：Bit (uncredited)

罗伯特·F.霍伊

Robert F. Hoy

饰：Charlie (uncredited)

Ned Le Fevre

饰：Institute Worker (uncredited)

Sydney Mason

饰：Announcer (uncredited)

Robert Nelson

Robert Nelson

饰：Dr. McCuller (uncredited)

Ginger Stanley

饰：Woman carried by gill man on pier (uncredited)

伯特史蒂文斯

Bert Stevens

饰：Man in Search Party (uncredited)

查尔斯·维克托

Charles Victor

饰：Cop (uncredited)

Bob Wehling

饰：Joe, man with searchlight (uncredited)