PersonJohn Dark9 credits in the catalogue: production.ProductionJason and the Argonauts1963Production ExecutiveHalf a Sixpence1967Executive ProducerThe Land That Time Forgot1974ProducerThe Beast Must Die1974Associate ProducerMadhouse1974Associate ProducerAt the Earth's Core1976ProducerWarlords of Atlantis1978ProducerArabian Adventure1979ProducerShirley Valentine1989Executive Producer