Doctor Who

The Invisible Enemy - S15-E2

Factual error: Titan is depicted as a Moon-like landscape with no atmosphere. In actual fact, Titan has a nitrogen/argon atmosphere denser than Earth's, and a reddish-orange sky. This was detected almost thirty years before The Invisible Enemy was made, so somebody slipped up in doing their research.

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Underworld - S15-E5

Factual error: While it's true the centre of a planet would have no net gravity, the weightless condition would be everywhere, not concentrated in a convenient shaft.

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