Radio Times are celebrating the best of TV, radio and books with a host of stars and TV insiders appearing on The Green at Hampton Court Palace for the Radio Times Festival. Every ticket includes access to gourmet food stalls, a shopping village, free events and screenings. Join Simon Guerrier and Dr Marek Kukula, authors of The Scientific Secrets of Doctor Who, as they explore the possibilities of time travel, life on other planets, artificial intelligence, parallel universes and more. Using clips from the acclaimed series, they will show how science has inspired Doctor Who, and how, on occasion, it has come remarkably close to predicting future discoveries. Under 5 years go free, but must be seated on parents lap. Over 16s must purchase an adult ticket.