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 networks operating at the time. Other charades shows have included "Stump the Stars"; "Movietown, RSVP"; "Celebrity Charades"; "Showoffs" and "Body Language". TV panel shows saw their peak of popularity in the 1950s and '60s, when CBS ran the three longest-running panel shows in prime time: "What's My Line?", "I've Got a Secret" and "To Tell the Truth". At times, they were among the top ten shows on U.S. television, and they continue to experience occasional revivals. All three Goodson-Todman primetime shows were cancelled by CBS in 1967 amid ratings declines and trouble attracting younger viewers, although the programs were consistently