Spoilers are precisely defined here. Rules vary by the story's medium. Info from television stories can't be added here until after the top or bottom of the hour, British time, closest to the end credits roll on BBC One. Therefore, fans in the Americas who are sensitive to spoilers should avoid Tardis on Sundays until they've seen the episode.


Clarke's Law

Technology and Magic Highlight - Episode 8 Doctor Who BBC America

The Thirteenth Doctor quotes Clarke's Law. (TV: The Witchfinders)

Clarke's Law stated, "Any sufficiently advanced form of technology is indistinguishable from magic." (TV: Battlefield)

The Captain paraphrased this by explaining that his now-wrecked craft had possessed technologies "indistinguishable from magic." (TV: The Pirate Planet)

The Seventh Doctor reminded Ace of Clarke's Law and stated that "the reverse is true", as was the case of the Thirteen Worlds, a parallel universe where technology formed alongside magic. (TV: Battlefield)

When Angelo Colasanto believed Captain Jack Harkness' vortex manipulator to be magic, Jack corrected him saying it was technology, although the two could be indistinguishable. (TV: Immortal Sins)

The Twelfth Doctor paraphrased the law to Clara Oswald when stating how he would impress a Viking village with a Yo-yo. (TV: The Girl Who Died)

The Thirteenth Doctor quoted the law to King James I. (TV: The Witchfinders)

Behind the scenes[]

In the real world, this is actually Arthur C. Clarke's Third Law.