Spooky happenings are going on at Boo-letchley Park this Halloween. Important things are disappearing mysteriously into thin air, with cryptic notes being left behind as the only clue. Is it a ghoul taking them, or a mischievous imp? Or is it someone playing a clever trick? Bletchley Park needs fearless detectives to help solve this mystery, reveal the thief and recover the missing items.

Uncover clues hidden across Bletchley Park. Visit locations in any order, solving codes, ciphers and puzzles to reveal secrets along the way, with extra Halloween activities waiting for you at one of the locations. Are you brave enough to find out what’s going on?