Fifty years ago more than 437,000 Hungarian Jews were deported to Auschwitz, murdered and disposed of in crematoria that could deal with 3,000 bodies a day. As the Soviet Army advanced the Nazis attempted to destroy evidence of their war crimes, including the crematoria.
Historians sympathetic to the Nazi cause have taken advantage of the lack of evidence to argue that the "final solution" is a myth. But in 1991 Professor Gerald Fleming discovered that a mass of architectural plans and documents relating to Auschwitz had in fact survived, in a secret library in Moscow.
He and architect Robert Jan van Pelt show how German architects and engineers colluded with the SS in constructing a machinery designed for genocide.
Tonight's film reveals the evidence, and asks if the guilty would have escaped if the files had been available earlier.
(Stereo) (Subtitled)
(Transcript: send a cheque for £2.00, payable to BSS, to [address removed].