Richard Osman has revealed he turned down the chance to appear on Celebrity TraitorsThursday Murder Club creator Richard Osman has claimed he turned down the chance to appear on The Celebrity Traitors. When asked if he was invited to take part in the series, Osman told ITV’s Good Morning Britain: “I was, everyone who’s been on Celebrity Traitors won’t tell you anything. “I love Celebrity Traitors, but I said I would only do it if I could be a traitor. He also refused to speak about a follow-up to the Netflix film adaption of The Thursday Murder Club, but claimed it was “the most requested sequel in Netflix history”. Osman was promoting the latest book in the Thursday Murder Club series, The Impossible Fortune, which was published on September 25.