Quick Summary The Celebrity Traitors will start on Wednesday 8 October with an extended first episode. The show will see 19 celebrities stepping into the infamous traitors castle, trying to find out which of them are up to no good. It's been a long time coming, but arguably the BBC's biggest show is coming back on 8 October – both to terrestrial TV and BBC iPlayer – and this time the first episode is mammoth. The Celebrity Traitors is the first time the show swaps members of the public for famous contestants, and as a result it will kick off with a 70-minute opening episode. The Celebrity Traitors | Official Trailer - BBC - YouTube Watch OnAs with the usual show, The Celebrity Traitors sees a handful of contestants chosen to be traitors, with the others trying to banish them before they are each "murdered".