Son of Saul, The Sound Barrier, 1916 v 2016

With Francine StockLaszlo Nemes discusses Son Of Saul, his Oscar winning film about life and death in a Nazi concentration camp.Sir Christopher Frayling takes us behind the scenes of The Sound Barrier, David Lean's celebration of British engineering and innovation that was somewhat economical with the facts.1916 was the year that the pictures got big, but with Snow White, Sherlock Holmes and special effects blockbusters taking over cinemas, what has really changed 100 years later. Historians Matthew Sweet and Kevin Brownlow explain.