For several years in the late 1980s and early 1990s, Doyle hosted the two-hour mid-afternoon shift on ABC radio station 2BL in Sydney, earning a loyal following among listeners and demonstrating that he was not only extremely knowledgeable on a huge range of subjects, but was also a superb interviewer. He took over many existing program segments and made them entirely his own, and his regular conversations with guests such as cooking expert Barbara Lowery, Sydney Opera House media liaison officer "Commodore" David Brown (whom he nicknamed "The Salty Sea Dog"), gardening expert Angus Stewart (nicknamed "The Doctor Of The Dirt"), pop music expert and "Sydney Morning Herald" journalist Bruce Elder (nicknamed "The Professor of Pop") and "Sydney Morning Herald" TV Guide editor Tony Squires, became regular highlights of the show.