I just finished a marathon viewing of the 1973 Soviet mini-series "17 Moments of Spring", which is based upon Operation Crossbow (also called Sunrise) in which secret negotiations were held between SS General Wolffe and American Allen Dulles in March 1945. This proposal was done (supposedly) without President FDR's knowledge, and would have allowed a seperate peace and surrender of German troops in Italy to Allied forces....excluding Russia. It also would have allowed some form of the Nazi Regime to remain in place, including high-ranking officials of the SS, and Germany would continue it's fight with Russia, now aided by troops that would no longer be needed in the western front. The true story is something I found rather shameful and was glad to know (or at least believe) that FDR would never agree to any plan which would allow the Nazis to stay in power. Further research has revealed that many in the US considered Dulles' actions treasonous, and I would certainly add my name to that list.
Sorry for getting off track here! Back to the movie! It comes in a 6-DVD set, with two 1-hour episodes on each DVD. Totally spellbinding and suspenseful as Soviet agent " Stirlitz", who is deep undercover as an officer in the Nazi SD matches wits with Gestapo chiefs Mueller and Kaltenbrunner. There are many sub-plots woven into this spy story and it is extremely well scripted and acted. Again...you must be willing to tolerate English subtitles.
The cost is about $54.00 at russiandvd.com, but you are getting about 12 hours of quality entertainment for your money.