Eventually, they ended up under house arrest near the Iranian border. They "escaped" to walk across the border into Iran.
I remember an old TV documentary about the development of aircraft; one of those fliers said, during Russian captivity, they were treated well, and were assured that they’d be allowed to go home soon, just be patient.
A couple of years after the war he went to an air show, where countries were showing off their latest stuff.
The USSR had an exact knockoff of his B-25, duplicated down to the most minute detail, including bulletholes. :^)