Colditz Season 2 Episode 7 French Leave ( Air Date 1974-02-18 ) Genre Drama, War & Politics category. Overview "Colditz has a choir and they are asked by the local pastor to sing in his church for the Easter service. Captain Vaillant sees this as a means of escaping in order to avoid being transferred to Poland with the rest of the French contingent. Meanwhile a secret radio is bringing news of the war to Colditz.".