The ubiquitous Fry is on our screens again, with a programme about Platonism, on BBC Four.

In Magic Numbers: Hannah Fry’s Mysterious World of Maths, “Dr Hannah Fry explores the mystery of maths. Is it invented like a language or is it discovered and part of the fabric of the universe?”

Episode 1 is on the iPlayer for about three more weeks, and episode 2 of 3 is on tonight at 21:00.