The villagers of Cwmgiedd, southwest Wales, are the stars of Humphrey Jennings' unforgettably inventive drama-doc. At Lidice, Czechoslovakia, a mining community's entire male population was executed by the Nazis in 1942. Jennings (often said to be Britain's greatest documentary filmmaker) ingeniously retells the story as if happening in Cwmgiedd, whose inhabitants re-enact the tragic events.