This takes the Sixth Doctor and the Brigadier into an investigation of what really happened in Hitler's last days. There have, historically, been many different conspiracy theories and many different contradictions by the officially registered details. The Russians who initially discovered Hitler's corpse identified him by dental records but only made the record definite that the corpse was certainly Hitler's in 1967. Claire, a wonderful supporting character, and the Brigadier do much investigating, finding documents suggesting Hitler survived what history records as his last days. There was Smersh activity suggesting that Yuri Andropov was moving the corpses and ordered them destroyed.
Many questions begin to arise in the telling of the tale.
Her corpse had glass in the mouth, possibly from a poison vile, and mysteriously had shrapnel in the body. There was a body that completely resembled Hitler found in a water tower. And the jaw of Hitler's corpse was not attached. The Doctor seeks the help of his old friend Winston Churchill who hates Hitler. Through espionage and sky-diving, the Doctor manages his way into Hitler's entourage where he poses as the Nazi Doctor Johann Schmidt.