I once saw the last 2/3 of a great movie, but never could find out the title. It’s made perhaps in the 1950s, and it stars William Holden as a Swedish businessman “persuaded” by the English into spying on the Nazis with whom he does business. Eventually he is discovered and must escape from the Nazis through Amsterdam. It’s a great spy flick and I’d love to see it again, but I don’t know its name! Help?
The Counterfeit Traitor (1962)
In future I’d recommend you try the IMDB first. You’d probably save yourself a lot of time. All it took was a search on William Holden and then I just guessed at the first ‘spy-sounding’ title where he played a character with a Swedish-sounding name.
Ooohh matt, you beat me to it 
Thanks, mattk and monster. That’s the movie, all right. I bookmarked the IMDB. I had been using the TV Guide Online/Movie Database, but this one works better.