The Prize (1963)

A group of Nobel laureates descends on Stockholm to accept their awards. Among them is American novelist Andrew Craig, a former literary luminary now writing pulp detective stories to earn a living. Craig, who is infamous for his drinking and womanizing, formulates a wild theory that physics prize winner Dr. Max Stratman has been replaced by an impostor, embroiling Craig and his chaperone in a Cold War kidnapping plot.