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
Sean Lock film "This Filthy Earth", based on the novel "La Terre" by Émile Zola. In 2004, Lock had a guest appearance in television's first ever "dope opera", "Top Buzzer", written by Johnny Vaughan. In 2005 he became a regular team captain on the panel game "8 Out of 10 Cats". In spring 2006, he hosted his own entertainment show on Channel 4 called "TV Heaven, Telly Hell". Lock narrated the BBC production "World Cup Goals Galore" in 2006. In 2008 he appeared on "The Big Fat Quiz of the Year", on a team with James Corden. Lock has also appeared on