约瑟夫·科顿

Joseph Cotten

饰：Admiral

伦纳德·尼莫伊

Leonard Nimoy

饰：Commander Phil Kettenring

威廉·温德姆

William Windom

饰：Captain Frank Reardon

罗恩·马萨克

Ron Masak

饰：CPO Corky Schmidt

洛伊德·海恩斯

Lloyd Haynes

饰：Lieutenant Dave Burston

杜威·马丁

Dewey Martin

饰：Skip Langley

基南·怀恩

Keenan Wynn

饰：Orville Kelly

Malachi Throne

饰：Dr. Dykers

山姆·艾里奥特

Sam Elliott

饰：Ensign William `Bill` Sandover

艾弗·巴里

Ivor Barry

饰：Donald Ellington

Gordon Hoban

Gordon Hoban

饰：Second Karp

Lee Stanley

饰：Lieutenant Manners

David Thorpe

David Thorpe

饰：Lieutenant Benson

Henry Olek

Henry Olek

饰：Cab Driver

Dale Tarter

Dale Tarter

饰：Clarence W.

约翰·温斯顿

John Winston

饰：English Scientist

Mark Russell

拉里·麦考密克

Larry McCormick

饰：Radio Operator

James Beach

James Beach

饰：Radar Operator,(as Jim Beach)

Paul Sears

饰：Paine

Bill Keller

饰：Shore Patrolman