Each series has had a different co-host, under the title of curator of the museum. Bill Bailey acted as co-host of the programme in the first series, before leaving the show after deciding to "retire" from panel games. Sean Lock, Jon Richardson, Dave Gorman, Jimmy Carr, Humphrey Ker, Phill Jupitus, Sarah Millican, Noel Fielding, Jo Brand, Romesh Ranganathan, Sally Phillips, Lee Mack, Bridget Christie and Alice Levine have all assumed the role for a series. Gorman also stood in for Richardson for one episode of the third series, after Richardson was stranded due to the eruption of Eyjafjallajökull. Ker also functioned as a stand-in, this time for Jimmy Carr, when Carr was unable to attend one episode in series 5.