Admiral Eric Pressman

Bailey Lafeld

John Locke

Peter Bach / Peter Bach (voice)

Yancy

Bryant Wilbourne

Jack Moseley

Dale Lacy

Buddy Kelsey

Supporting Role

Captain Minardi

Sheriff Joe Haller

Claude Harbrough

Goldberg (uncredited)

Judge Hilburn

Frank Devereaux

Howard Hughes

Detective Buck McGovern

Rollin H. Parker

Launch Director

Dr. Gene Clifford / Jerry Blake

Self

Colonel Pierce Grissom