 Jack Dee, Colin Sell and Tim Brooke-Taylor were joined by Tony Hawks and Miles Jupp on the panel, with the fourth spot rotating between Rory Bremner, Richard Osman and John Finnemore.Marcus Brigstocke also appeared in place of Jupp on some dates, and Barry Cryer made a special appearance at the Watford Colosseum show.Episodes of "I'm Sorry I Haven't a Clue" were included in the package of programmes held in 20 underground radio stations of the BBC's Wartime Broadcasting Service (WTBS), designed to provide public information and morale-boosting broadcasts for 100 days after a nuclear attack.