Quizmaster Neil Delamere is dishing out the points and when he’s not doing that he takes a perilous journey across a rickety walkway, 500ft above the largest radio telescope in the world – a journey that puts him – and his underpants – in mortal danger. This week he’s celebrating Belfast born astrophysicist Dame Jocelyn Bell-Burnell who discovered Pulsars – the lighthouses of the universe.