Harry Potter: A History Of Magic

9PM, BBC2

To mark the 20th anniversary of J.K. Rowling’s extraordinarily successful book Harry Potter And The Philosopher’s Stone, a special Harry Potter-themed edition of Talking Pictures

(8.30pm) is followed by this documentary uncovering the real-life traditions behind her magical creation – it turns out that it’s not all make-believe after all. A thrilling ride through legend and folklore, the film goes behind the scenes as the British Library prepares a new exhibition inspired by the boy wizard’s adventures, and hears from the author herself.