Persian Lessons - a film last night, on BBC Four. It's on Iplayer. With sub-titles, well worth the effort. Set during WWII, in a Holocaust camp, one of the inmates pretends to be a Persian speaker. A German officer with plans to survive the war, wants to learn Persian for his own escape to Persia after the war, so takes the prisoner under his wing to teach him. Magnificent twist at the very end of the story, which is supposedly based on fact.