The Man Who Knew Too Much (1956)

Overview
An American doctor and his wife, a former singing star, witness a murder while vacationing in Morocco, and are drawn into a twisting plot of international intrigue when their young son is kidnapped.
Cast
James Stewart, Doris Day, Brenda De Banzie, Bernard Miles, Ralph Truman, Daniel Gélin, Mogens Wieth, Alan Mowbray