The Third Man: Series 1 (1959)

Harry Lime (Michael Rennie) makes money dealing art and solves crime to save his life...When a 16th Century jewel-case en-route to Harry Lime is stolen at gunpoint on the high seas, Harry suspects a unscrupulous Greek shipping magnate whom one of Lime's old flames once married for money...A French movie producer and art connoisseur won't buy a treasure from Lime, but spends lavishly on rubbish. It turns out to be a case of blackmail concerning the producer's wartime conduct...Harry searches for the only man who knows the location of a Free-French freighter that was sank in World War II with a half-billion dollars of gold in its hold. His only clue is the man carries a gold medallion...