Also at 14.30pm on 18 February. Venue: The Lund Theatre, University College School, Frognal, Hampstead NW3 6XH. Sherlock Holmes is missing, presumed dead, after a fight with his arch-enemy Moriarty. But a group of teenagers, who Sherlock befriended - the Baker Street Irregulars - don't believe he is really dead and convene at his home to investigate further. Admission £12, £10. To book 020 7723 6609. https://www.ticketsource.co.uk/gardensuburbtheatre www.gardensuburbtheatre.org