After the success of the 1984 film Ghostbusters, a cartoon adaptation was inevitable. The Real Ghostbusters first started airing on ABC in September 1986. The series was so successful that it went into daily syndication in 1987, with sixty-five episodes airing in syndication simultaneously with new episodes in the official second season in 1987. At the start of the third season in 1988, the show was renamed to Slimer! and the Real Ghostbusters and expanded to an hour long time slot, during which the regular thirty-minute episode aired along with a half-hour Slimer sub-series which included two to three short animated segments focused on the character Slimer. In 1989, the boys got their own prime-time special, with The Halloween Door.