Welcome to Reading. It’s 1929 and The Royal County Theatre is packed.
Everyone’s thrilled to welcome the American movie star, Philip “Buff” Yale Drew, on stage with the smash hit, The Monster.
But Tragedy strikes.
Someone’s killed poor old Alfred Oliver, the tobacconist of Cross Street, Reading…
Click on the images across the map and see if you can work out whodunnit.
Think you’ve got it? Listen to the full story on BBC Sounds.