8 Out of 10 Cats Does Countdown as part of its 30th anniversary celebrations. Amongst the programmes that were chosen to be merged for the evening of specials, production teams on "Countdown" and "8 Out of 10 Cats" agreed to merge the two formats of their respective programmes together - the crossover between the two formats meant that "Countdown"s arrangement of games would be interspersed with "8 Out of 10 Cats"-style banter. As part of the merger, both Rachel Riley and Susie Dent assumed their roles from the programme, while Jimmy Carr took on the mantle of host, with both Sean Lock and Jon Richardson competing as
Panel show decades-long runs in the UK: "Twenty Questions" lasted until 1976, while "Just a Minute" has remained on the air with the same host since 1967. Other long-running games on radio include "I'm Sorry I Haven't a Clue" since 1972, "The News Quiz" since 1977, "My Word!" from 1956 to 1988, and "My Music" from 1967 to 1994. The British version of "What's My Line?" may have been the first television panel show in the UK, with an original run from 1951 to 1963 and several remakes in later years. The word game "Call My Bluff" aired from 1965 to 2005,