With the 55 year history of the series, the Doctor Who universe is rather vast. Many strings connecting x and y together sometimes get tied up with others thanks to fans of the show devising their own theories about The Doctor themselves, their companions, and their enemies. Some of them actually aren't all that ridiculous...
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Voiceover: Rich Hutson.
Video Editor: Rich Hutson.
Original Article by Danny Meegan can be found here.