8 Out of 10 Cats show has to be edited to fit in its 26-minute slot. From series 9 there is a longer version of the show called "8 Out of 10 Cats Uncut", broadcast a few days later. These rounds only featured in series 1 and the "Big Brother" special shows: Since 2012, crossover episodes between "8 Out of 10 Cats" and "Countdown" have aired. The show follows the format of "Countdown", but is hosted by Jimmy Carr, with permanent contestants Sean Lock and Jon Richardson, as well as two other guest contestants. On 4 January 2013, a special episode of "Deal or No
Who Knows? (game show) 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 was broadcast on Fridays at 9 p.m.