There are Doctor Who fans all over the world who vow to watch the show on a never ending repeat and some would perhaps even call it a religion. Doctor Who has had a huge influence on the world. Many embrace it and many hide that fact - nevertheless, the show has a special place in everyone's heart and that can and will never be changed. The fans of the show are the ones that holds the show altogether. Forget the writers and the cast and crew, it's its dedicated legion of fans who are in control. They determine how successful the show is and the outcome of each episode with their reviews and opinions. So, the fans play an important and fundamental part in the Doctor Who legacy. But how can people tell that other people are a fan of the show that's forever been part of their lives? Sometimes it can be so easy to spot a Doctor Who fan from the crowd but on some occasions, one can hide it pretty well. Here are 10 ways to spot a Doctor Who fan a mile off including some useful traits to look out for. These are just guidelines but they should help to point you in the right direction. Let's get started!