18:20Pointless CelebritiesSeries 12Space and ScienceBBC One Duration: 49 minutes Sat 7th Sep 2019, 18:20 on BBC One WalesA special edition of the quiz featuring big names from the world of science. Show more ContributorsPresenter:Alexander ArmstrongPresenter:Richard OsmanParticipant:Maggie Aderin-PocockParticipant:Michael BrooksParticipant:Dallas CampbellParticipant:Heather CouperParticipant:Rick EdwardsParticipant:Lucie GreenParticipant:Nigel HenbestParticipant:Mark ThompsonDirector:Jan GenesisExecutive Producer:Tamara GilderExecutive Producer:Richard HagueGenresEntertainmentFormatsGames & QuizzesBrandPointless CelebritiesSeriesPointless Celebrities: Series 12 Source: BBC Online