As far as his son knew, Captain Robert Trimble was a distinguished bomber pilot in WWII; flying out of England and striking targets deep within Germany, he performed one of the most dangerous jobs in the US military. However, during his father's final years, Lee discovered another side of the war for Captain Trimble: a classified mission that took him into the newly-occupied Soviet territories of Eastern Europe. Beyond the Call tells this extraordinary story, and could be taken for a historical thriller were it not for the meticulous efforts Lee Trimble put into researching the historic records that back up his father's personal recollections. Glamorous Soviet spies, Allied POWs and Cossacks collide in this extraordinary account of how one man unwittingly wound up at the heart of US-Soviet relations, and directly saved hundreds of lives.