Synopsis
In order to save an assassinated scientist, a submarine and its crew are shrunk to microscopic size and injected into his bloodstream.
Cast

Stephen Boyd
Grant

Raquel Welch
Cora

Edmond O'Brien
General Carter

Donald Pleasence
Dr. Michaels

Arthur O'Connell
Col. Donald Reid

William Redfield
Capt. Bill Owens

Arthur Kennedy
Dr. Duval

Jean Del Val
Jan Benes

Barry Coe
Communications Aide

Ken Scott
Secret Service

Shelby Grant
Nurse

James Brolin
Technician
Brendan Fitzgerald
Wireless Operator

Brendon Boone
Military Policeman (uncredited)

James Doohan
Dr. Sawyer (Hypothermia technician) (uncredited)

Kenneth MacDonald
Henry - Heart Monitoring (uncredited)

Christopher Riordan
Young Scientist (uncredited)
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