 However, a move to Luton High Street was ruled invalid for being too remote.In other episodes, an attempt was supposedly made to expand the territory to Manhattan (via Heathrow and JFK) but there was some disagreement as to whether or not the New York City Subway system was suited to the game.References have been made in various episodes of "ISIHAC" to international versions of the game, including "Mornington Croissant", supposedly based on the Paris Métro, and "Mornington Peninsula", the Australian variant.