One, Two, Three (1961)

Director: Billy Wilder
Cast: Hanns Lothar, Horst Buchholz, Howard St. John, James Cagney, Karl Lieffen, Liselotte Pulver, Loïs Bolton, Pamela Tiffin

Synopsis:

C.R. MacNamara will do anything to get a promotion within the Coca-Cola company, including looking after boss W.P. Hazeltine’s rebellious teenage daughter, Scarlett. When Scarlett visits Berlin, where C.R. is stationed, she reveals that she is married to a communist named Otto Piffl — and C.R. recognizes that Otto’s anti-establishment stance will clash with his boss’s own political views, possibly jeopardizing his promotion.