One, Two, Three (1961)

In the politically charged atmosphere of Cold War Berlin, C.R. MacNamara, a Coca-Cola executive with big ambitions, faces a daunting challenge. Assigned to look after his boss's naive daughter, Scarlett, Mac's life is turned upside down when she marries Otto, an ardent East German Communist. With Scarlett's parents on their way to retrieve her, Mac must transform Otto into a respectable son-in-law, all while trying to salvage his own career.