It's a covert game of cat and mouse set on the streets of London! Criminal mastermind Mr. X has escaped Scotland Yard and it's up to you, the detectives, to catch him! Use your travel tickets to anticipate his movements and chase him by taxi, bus, and the underground around Picadilly Circus, along the River Thames, and through Paddington Station. Will you apprehend this dangerous criminal, or will he disappear in the London fog?