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
Captain Nemo in 1874 but is set immediately after the American Civil War, from 1861 to 1865. This would mean that Captain Nemo who appeared in "The Mysterious Island" dies "before" Captain Nemo who appeared in "Twenty Thousand Leagues Under the Sea" sets out on the undersea travels. Also, when Captain Nemo is finally seen in "The Mysterious Island", he mentions having met Aronnax 16 years previously. Many errors in the original French first printing (the 'grand in-8' published by Pierre-Jules Hetzel) are likely the fault of the editors who, at that time, were unlikely to consult the authors of the books