After three British agents are assigned to assassinate a mysterious German spy during World War I, two of them become ambivalent when their duty to the mission conflicts with their consciences.
Director:
 Alfred Hitchcock
Writers:
 Campbell Dixon (play), W. Somerset Maugham(novel), 4 more credits »
Stars:
 John Gielgud, Madeleine Carroll, Robert Young - via IMDB
https://archive.org/details/Hitchcock_Secret_Agent