Don't know if it was ever on TV there, but the History Channel had two long documentaries, one about the surrender of the German rocket engineers to Allies, and the other about the capture of the FW 190, ME 262, and other aircraft and parts, like the Horten Ho 2-29 stealth bomber. It has old films of Eric Brown and Jeffrey Quill flying captured Luftwaffe jet aircraft. What a set of nerves, to just climb in an unknown aircraft and take off. No sweat, total confidence.
But during WWII, any pilots who survived to 1943 had to do that, as new bombers and fighters were sent to the front. A few skilled pilots would learn how to fly them, then teach the others without risking precious machinery, by just reading manuals and sitting in at the controls blindfolded. My father and his friends learned on biplanes, then single wing T-34 trainers, then the P-40, and in the field, the B-24, B-25, B-26, P-47 Thunderbolt, P-38 Liightning, and P-51, B-17, B-29, and A-26. Especially in the Pacific , some pilots flew fighters, dive bombers, bombers and cargo planes - whatever was available, and whatever the mission, as new aircraft came on line.