Another great performance by James Mason - he is wonderful as the brainy, underestimated valet of the British Ambassador to Turkey who feeds invaluable information to the Nazis for a price. The betrayals and counter-betrayals throughout make this a terrific suspense film. As usual, I find myself hoping that James Mason will get away with his crimes, even in spite of the despicable nature of his treachery and to whom he is betraying his secrets. The ending is satisfying in the most perfect way.
