格利高里·派克

Gregory Peck

饰：Charles Keith

理查德·克里纳

Richard Donald Crenna

饰：Jim Pruett

大卫·简森

David Janssen

饰：Ted Dougherty

詹姆斯·弗朗西斯

James Franciscus

饰：Clayton Stone

吉恩·哈克曼

Gene Hackman

饰：Buzz Lloyd

南茜·科沃克

Nancy Kovack

饰：Teresa Stone

玛丽特·哈莉

Mariette Hartley

饰：Betty Lloyd

斯科特·布兰迪

Scott Brady

饰：Public Affairs Officer

Craig Huebing

饰：Flight Director

弗兰克·马斯

Frank Marth

饰：Air Force System Director

John Carter

饰：Flight Surgeon

Vincent Van Lynn

Vincent Van Lynn

饰：Aerospace journalist

乔治·盖恩

George Gaynes

饰：Mission Director

Tom Stewart

Tom Stewart

饰：Houston Cap Com

Duke Hobbie

饰：Air Force Titan specialist

沃尔特·布鲁克

Walter Brooke

饰：Network commentator

Dennis Robertson

Dennis Robertson

饰：Launch Director

Bill Couch

饰：Russian cosmonaut (uncredited)

Mauritz Hugo

饰：Hardy (uncredited)

玛丽·琳达·拉佩利耶

Mary Linda Rapelye

饰：Priscilla Keith (uncredited)

Bruce Rhodewalt

饰：Computer technician (uncredited)

乔治

George R. Robertson

饰：VIP (uncredited)

George Smith

饰：Cape Weather Officer (uncredited)

肯纳G.肯普

Kenner G. Kemp

饰：Guest in Observation Room (uncredited)

李·格兰特

Lee Grant

饰：Celia Pruett

Don Ames

约翰·福赛思

John Forsythe

John S. Ragin

John Roy

埃迪·史密斯

Eddie Smith

Robert Strong