Soon after an American (Lloyd Bridges) arrives in London, the man he was standing beside is killed by a sniper. What connection could the victim have with the wartime flame he’s come to see? 1953. Part 1 of 2.
Original movie from Internet Archive
Movie info from IMDB
Lloyd Bridges @ Wikipedia
Lloyd Bridges moments from Airplane! @ YouTube
Lloyd, Jeff and Beau Bridges at the Academy Awards @ YouTube
Jean Marsh interview @ The Telegraph