Garry Halliday was a British television series for children on the BBC from 1959 to 1962. The show starred Terence Longdon as airman Garry Halliday. The episodes were based on books by Justin Blake: Justin Blake was in fact a pseudonym for the writers John Griffith Bowen and Jeremy Bullmore. Reminiscent of Biggles, Halliday was a pilot for a commercial airline, Halliday Charter Company, and flew to his adventures in an aircraft with the call sign Golf Alpha Oboe Roger George. He was assisted by co-pilot Bill Dodds, played by Terence Alexander. The airline's control base station was Lima Foxtrot. Their enemy was The Voice, played by Elwyn Brook-Jones, so called because he was never seen by other characters, so that at the end of each series he could escape and reappear in the next, invisible even to his own gang, The Voice at first shone a powerful light in their faces to disguise his identity; later he used closed-circuit television.