Thunder Rock is a 1939 play by Robert Ardrey. The initial Broadway production, put on by the Group Theater and directed by Elia Kazan, closed after a short run, but the play was far more successful in wartime London. Thunder Rock became a symbol of British resistance and was the most notable play of World War II. It was first produced in a little-known theater in South Kensington but was transferred, with secret funding from Her Majesty's Treasury, to the Globe Theatre in London's West End.: 66 Thunder Rock has seen many adaptations, including a BBC radio version in 1940 and a 1942 film starring Michael Redgrave and Barbara Mullen with James Mason in a minor role. In 1947 CBS broadcast a radio production; it was awarded a Peabody Award. Stage productions have been mounted all over the world, including an unauthorized production in Zurich, a U.S. government-sponsored production in occupied Berlin,: 24–5  and popular post-war productions throughout Europe and Africa, including in Harare and Nairobi.: 66  Source: Wikipedia (en)