The Night the World Exploded

William Leslie

Dr. David Conway

Kathryn Grant

Laura 'Hutch' Hutchinson

Tristram Coffin

Dr. Ellis Morton

Raymond Greenleaf

Gov. Chaney

?

Paul Savage

Ranger Kirk

?

Fred Coby

Ranger Brown

Frank J. Scannell

Sheriff Quinn

Charles Evans

Gen. Bortes

Marshall Reed

General's Aide

Terry Frost

Chief Rescue Worker

?

David Armstrong

Military Policeman (uncredited)