Initially there are the obvious visits to imdb and Wikipedia. Then there are DVD special features and the almost unrivalled power of direct inquiry using social media. You realise quickly that Google is your friend. Keyword searches to unearth production articles often have great results and then there is the power of Google Streetview. It allows you to virtually look around many streets both in the UK and abroad to verify location information. Occasionally checking out a film in high definition will enable you to read a previously fuzzy street-sign.