After changing into a Russian uniform to make his escape, Major Pearman (Hugh Daly),can be seen(in various shots), wearing a tan Russian side cap. The hat disappears and reappears throughout the escape. (These scenes were shot in three different locations over four months.)
In the final scene there is an American flag behind the officer sitting at as desk. It shows 50 stars. The date is 1948; there should be 48 stars on the flag.
Both Michael Berryman and Jack Dimich's characters are referred to in the movie as "Colonels." However, both are actually wearing the Soviet rank insignia of Major.