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
Who Knows? (game show) from 3 July to 25 September 1959. Who Knows? (game show) Who Knows? is a Canadian television panel game quiz show which aired on CBC Television in 1959. James Bannerman hosted this show in which a panel attempts to guess the identity of an artifact from a gallery or museum. Archaeologists Walter Kenyon and John Lunn of the Royal Ontario Museum were regular panelists who were joined by a third guest panelist. This concept was previously demonstrated during some episodes of "Tabloid". CBC broadcast a similar panel game quiz program, "What on Earth", from 1971 to 1975. This half-hour series