 Madoc acted on stage with the Royal Shakespeare Company, playing the roles of Iago, Othello and Dr Faust.As a television actor he first gained widespread recognition in two serials, first as the relentless SS Officer Lutzig in the Second World War serial "Manhunt" (1969), and then as the vicious Huron warrior Magua in a serialisation of "The Last of the Mohicans" (1971).According to "The Daily Telegraph", BBC News and "The Times", Madoc is especially remembered for his role in "The Deadly Attachment", an episode of the comedy "Dad's Army" in which he played a U-boat captain held prisoner by the Walmington-on-Sea platoon of the Home Guard.