It has been so long ago I have the original book on OSS also works on A Man Called Intrepid, by William Stevenson, 1976, so much in the movies and that is different than the real story.
In that book I read the horrible thing that took place in Canada as it was being taken over by the Communist this one setting where those who got in the way was toss down the incinerator in this legit office building.
“Wild Bill” Donovan: Father of US Intelligence
http://www.youtube.com/watch?v=Rnh8vrUGzt4
OSS - Undercover Training
http://www.youtube.com/watch?v=FbuF_QwRP-E
OSS was ‘riddled’ with Soviet agents. Donovan.s # 1 aid Lt Col. Duncan Lee was a Soviet agent. Actor, Sterling Hayden, an OSS agent in WWII, became a communist and worked for them, after the war, back in Hollywood