Jack Hawkins makes stellar acting look easy in the episode, a strong statement about "pulling the bandage off" to reveal old war wounds and settle the score for treachery.
In the tiny village of St. Paul near Toulon in France, Hawkins visits after a rickety bike ride to get to the bottom of the murder of an old war buddy turned Nazi hunter. No, he wasn't there hunting Nazis, but instead on the trail of a traitor in the Resistance who finked on his comrades to the Nazis during the occupation.
Everyone in town is against him, but Hawkins cannot be deterred from hunting down the bad man among them. This is such an urbane story, tightly directed with utter class by Basil Dearden, that instead of violence it's a thinking man's litle thriller, loaded with the drollest of humor. Future ace director John Schlesinger gets a "Exterior director" credit, presumably having shot second unit footage to establish the locale before the dialogue scenes were all made in the studio back in England.