Each detective begins with a total of 23 transport tickets: 11 taxi tickets, 8 bus tickets and 4 Underground tickets. Once each transport token is used by a detective, it is turned over to Mr. X, effectively giving him an unlimited amount of transport tokens. For each move that Mr. X makes, he writes down his destination. The game comes with a "travel log" and paper inserts to be used with it, on which Mr. X can write this. After making a note of his location, Mr. X covers it with the ticket that he has used to move there, giving the detectives a clue as to his whereabouts.