10 Doctor Who Secrets Everyone Knows But You

10. The Twin Pilots

Doctor Who kicked off on 23 November 1963, with the show's first episode, An Unearthly Child.

In this adventure, we meet the Doctor (played by William Hartnell) for the first time. He's parked the TARDIS in a scrapyard in England, kept company by his granddaughter Susan. Don't ask why the Doctor has a grandchild, it's far too complex to get into right now.

As pilot episodes go, An Unearthly Child did the job just fine. It introduced the characters, the premise, and the rules of the universe perfectly well, but did you know that two versions of the episode exist?

The first version of An Unearthly Child was deemed not good enough by the show's creator, Sydney Newman. He didn't like the way the Doctor was dressed, or how mean he was to his granddaughter. As a result, huge chunks of it were re-filmed and a second version was put together, with the first version not being publicly released until 1991.

Suppose we shouldn't be shocked that a show about regeneration went through a few different incarnations before broadcast!