Curt Lowens

as Cardinal Ebner

as VOPO Officer at Roadblock (uncredited)

as Dr. Schuller

as Fritz

as Mr. Hawkins

as Professor Hoffman

as German Colonel

as Ambassador Peterson

as Dr. Everton Brooks

as Airport Officer

as Capt. Bauer

as Mr. Forest

as Stanley Berrenger

as Soviet Embassy Official

as Dr. Von Vorman

as Bob Jones

as Colonel Blanche

as Dr. Sam Wyman

as Hotel Clerk

as Daglieri

as Captain Stevya

as Major Mecklin