By 1973, Number 96 had become Australia's highest-rated show. In 1974, the sexed-up antics of Number 96 prompted the creation of The Box, which rivaled it in terms of nudity and sexual situations and was scheduled in a nighttime slot. Produced by Crawford Productions, many critics considered The Box to be a more slickly produced and better written show than Number 96. The Box also aired on the Ten Network, programmed to run right after Number 96. For 1974 Number 96 was again the highest rating show on Australian television, and that year The Box occupied the number two spot. Also in 1974, the Reg Grundy Organisation created its first soap opera, and significantly Australia's first teen soap opera, Class of '74. With its attempts to hint at the sex and sin shown more openly on Number 96 and The Box, its high school setting and early evening timeslot, Class of '74 came under intense scrutiny from the Broadcasting Control Board, who vetted scripts and altered entire storylines. By 1975, both Number 96 and The Box, perhaps as a reaction to declining ratings for both shows, de-emphasised the sex and nudity shifting more towards comedic plots. Class of '74 was renamed Class of '75 and also added more slapstick comedy for its second year, but the revamped show's ratings declined, resulting in its cancellation in mid-1975. That year Cash Harmon's newly launched second soap The Unisexers failed in its early evening slot and was cancelled after three weeks; the Reg Grundy Organisation's second soap Until Tomorrow ran in a daytime slot for 180 episodes. A feature film version of Bellbird entitled Country Town was produced in 1971 by two of the show's stars, Gary Gray and Terry McDermott, without production involvement by the Australian Broadcasting Corporation. Number 96 and The Box also released feature film versions, both of which had the same title as the series, released in 1974 and 1975 respectively. As Australian television had broadcast in black and white until 1975, these theatrical releases all had the novelty of being in colour. The film versions of Number 96 and The Box also allowed more explicit nudity than could be shown on television at that time. In November 1976 The Young Doctors debuted on the Nine Network. This Grundy Organization series eschewed the adult drama of Number 96 and The Box, focusing more on relationship drama and romance. It