 "Bunny" Webber and Anthony Coburn, Coburn having worked on the pre-production and first story; the iconic Doctor Who theme music was written by Australian musician Ron Grainer; one-time Australian ballet composer Dudley Simpson wrote incidental music for many stories during the 1960s and 1970s; and the actress Janet Fielding played popular companion Tegan in the 1980s.Additionally, the Australian Broadcasting Commission (ABC) was one of the first and longest term purchasers of the series from the BBC, initially planning its Australian debut for May 1964, only six months after the UK premiere.In 1979 the ABC organised a nationwide promotional tour by then-current Doctor Tom Baker and, in 1983, it co-funded the 20th anniversary special "The Five Doctors".