Trivia / Doctor Who S30 E5 "The Poison Sky"

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• Acting for Two: Martha, as herself and Not Herself.
• Completely Different Title: The French title is "ATMOS Part 2".
• Serendipity Writes the Plot: Donna was originally meant to use a shoe to knock out the Sontarans, but because Catherine Tate only wears trainers they didn't want it to be a trainer, or they thought a trainer would be too soft and just bounce off the back of the neck. She got to use a mallet instead.
• What Could Have Been: In the episode, the Doctor cuts off Staal’s speech, during which a clip from the show Tommy Zoom plays. The original plan to show "Shaun the Sheep'' fell through.

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