sentences:  Bailey left the show after he initially decided to "retire" from panel games, and was replaced by Sean Lock in the second series.Each subsequent series has seen a different comedian take over as the sidekick/curator, with Jon Richardson, Dave Gorman, Jimmy Carr, Humphrey Ker, Phill Jupitus, Sarah Millican, Noel Fielding, Jo Brand, Romesh Ranganathan, Sally Phillips, Lee Mack and Bridget Christie assuming the role in the third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth and fourteenth series respectively.Gorman also stood in for Richardson for one episode of the third series, after Richardson was stranded due to the eruption of Eyjafjallajökull.