Dr. Matt Hastings

John Agar

Acting

Stephanie 'Steve' Clayton

Mara Corday

Acting

Prof. Gerald Deemer

Leo G. Carroll

Acting

Sheriff Jack Andrews

Nestor Paiva

Acting

Joe Burch

Ross Elliott

Acting

Josh

Hank Patterson

Acting

Paul Lund / Eric Jacobs / Airport Workman

Eddie Parker

Acting

Barney Russell

Bert Holland

Acting

Dr. Townsend

Raymond Bailey

Acting

Andy Andersen

Steve Darrell

Acting

Lt. John Nolan

Edwin Rand

Acting

Townsman

Wag Blesing

Acting

Jet Squadron Leader (uncredited)

Clint Eastwood

Acting

Telephone Operator (uncredited)

Dee Carroll

Acting