Based on "Operation Mincemeat" during World War II, this film is an excellent example of a spy movie that is interesting without being gimmicky or melodramatic. An excellent cast is headed by the redoubtable Clifton Webb. The elaborate plot to trick Nazis by using a corpse masquerading as a dead Royal Marine officer is amazing in its detail. The film is all the more astonishing because it is based on the actual ruse to deceive the enemy into thinking that the invasion of Italy would take place in a location other than where it actually happened. A good film for espionage lovers.