The first season of Countdown aired in 1974. This season was broadcast in black & white. Only a few segments have survived to this day.

The 1975 season was a significant moment for Australian television, as the first episode of Countdown's second season was the first scheduled program to be officially broadcast in color on ABC TV. The transition to color coincided with the show's move to its iconic Sunday 6 pm slot, allowing artists to be seen in all their flamboyant glory and helping to boost the careers of many Australian and international acts.

By 1976, Countdown had cemented itself as Australia’s premier music program. Sherbet dominated charts, Marcia Hines rose as a powerhouse voice, and the Bay City Rollers fueled teenage fandom. Molly Meldrum’s Humdrum segment shaped national music tastes, while the show’s format—performances, interviews, and guest hosts—kept audiences engaged. Countdown was now more than entertainment; it was the soundtrack of a generation.

In 1977, Countdown reflected the growing diversity of pop and rock. Local acts like John Paul Young and the Ted Mulry Gang thrived, while international stars such as Blondie and ABBA captivated audiences. Molly Meldrum’s interviews added personality, and the program’s influence on radio playlists was undeniable. By the close of 1977, Countdown had become the central stage for both Australian and global music.

The 1978 season showcased the rise of disco and new wave. Marcia Hines continued her success, while international guests like Kate Bush and Blondie brought fresh sounds to Australian audiences. The Countdown Dancers added visual flair, and Molly Meldrum’s commentary kept fans connected to the latest trends. The program’s cultural impact was clear: appearances often translated directly into chart success.

By 1979, Countdown was the dominant force in Australian music television. Acts like Split Enz and Little River Band gained momentum, while international guests such as The Police and Dire Straits expanded the show’s reach. The blend of local and global talent reinforced Countdown as the nation’s musical hub, shaping tastes and boosting careers.

In 1980, Countdown embraced the energy of new wave and pop-rock. Split Enz and Men at Work began their rise, while international stars like Madness and Queen electrified audiences. Molly Meldrum’s Humdrum segment remained central, guiding fans through the evolving music landscape. The show’s influence on record sales and radio playlists was unmatched.

The 1981 season highlighted the growing dominance of Australian acts, with Men at Work breaking through and INXS emerging. International guests like Kim Wilde and Phil Collins added global appeal. The program’s format—performances, interviews, and guest hosts—kept audiences engaged, while Molly Meldrum’s commentary reinforced Countdown’s role as a cultural touchstone.

By 1982, Countdown was at the heart of Australia’s pop explosion. INXS and Moving Pictures gained traction, while international stars like Duran Duran and Culture Club brought new wave flair. The show’s influence extended beyond television, shaping fashion and youth culture. Molly Meldrum’s presence ensured Countdown remained authoritative and entertaining.

In 1983, Countdown reflected the global rise of synth-pop and MTV-style presentation. Australian acts like Pseudo Echo and Real Life thrived, while international guests such as David Bowie and Spandau Ballet captivated audiences. The program’s mix of performance and commentary kept it fresh, reinforcing its role as the nation’s musical compass.

The 1984 season showcased the peak of Australian pop, with INXS and Pseudo Echo dominating. International stars like Madonna and Wham! brought global glamour. Molly Meldrum’s Humdrum remained central, while the show’s influence on youth culture was undeniable. Countdown had become both a stage and a trendsetter.

By 1985, Countdown was a fixture of Australian life. Kylie Minogue made early appearances, while INXS and Jimmy Barnes cemented their status. International guests like Tears for Fears and Eurythmics added global prestige. The program’s ability to launch careers and shape national taste was unmatched.

In 1986, Countdown continued to spotlight rising Australian talent, with Crowded House and Kylie Minogue gaining momentum. International acts like a-ha and Pet Shop Boys brought fresh sounds. Molly Meldrum remained the face of the show, guiding audiences through a rapidly changing pop landscape.

The final season in 1987 marked the end of an era. Crowded House and Kylie Minogue were among the standout acts, while international guests maintained global appeal. As the program concluded in July, its legacy was clear: Countdown had defined Australian music television for over a decade, shaping generations of fans and artists.