Throughout the 1960s and 1970s, numerous stories either weren't broadcast alongside the other serials from their respective seasons, or hadn't been purchased at all. Aside from "Invasion of the Dinosaurs" (see earlier reference), almost all of these serials were omitted because they'd been reviewed by the Australian Film Censorship Board (AFCB) and classified as not suitable for general viewing, which meant they couldn't be screened before 8:30 pm without having scenes of violence or horror edited down or removed entirely; even after being edited, many still couldn't be shown any earlier than 7:30 pm. Due to the BBC's junking policy during the 1970s, which saw the master copies of hundreds of early "Doctor Who" episodes destroyed, the majority of unscreened 1960s serials were never broadcast in Australia. Almost all of the 1970s serials were subsequently reviewed again by the Board and re-classified as being suitable for a general audience, but by 1980 one of them – "The Brain of Morbius" – was still classified as suitable only for adults; even after it was reviewed a second time by the AFCB for in 1978, it was still deemed to be too dark and violent for children. Eventually a heavily censored 60-minute omnibus edition of the story debuted on ABS-2 Adelaide at 8:30 pm in October 1978. It was later broadcast in all other capital cities in the same timeslot in January 1980. By 1986 it had been reconstructed as a four-part story, but the previous censor cuts remained. The ABC didn't play an uncensored version of "Morbius" until the show was being broadcast at 4:30 am weekdays during 1993.