The Zygon Inversion (TV story)

 was the eighth episode of the ninth series of Doctor Who produced by BBC Wales.

This episode saw the Twelfth Doctor describe the immense pain he felt while fighting in the Time War. It also revealed that there are two Osgood Boxes, and their design is based on that of the Moment; this symbolizes how the Doctor nearly destroyed his entire race with a box, just as Kate and Bonnie were about to destroy theirs.

It was also one of the first episodes to explore the idea of sympathy for an alien race, with one particular Zygon openly committing suicide.

Plot
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Cast

 * The Doctor - Peter Capaldi
 * Clara - Jenna Coleman
 * Osgood - Ingrid Oliver
 * Kate - Jemma Redgrave
 * Etoine - Nicholas Asbury
 * Zygons - Aidan Cook, Tom Wilton, Jack Parker
 * Voice of the Zygons - Nicholas Briggs

Uncredited cast

 * Bonnie - Jenna Coleman, Ingrid Oliver

Crew
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The Doctor

 * The Doctor claims to Osgood that his real first name is "Basil."
 * The Doctor nicknames Bonnie "Zygella."
 * The Doctor jokes that as he is over 2000 years old, thus he is old enough to be a Messiah.
 * The Doctor calls London a "dump." When Osgood says he goes there often, he says that does not mean he has to like it.

Clara

 * Clara has enough authority within UNIT that she can access the Black Archive without question. She is one of only four individuals who can access the Osgood Boxes (the others are Osgood, her Zygon double, and the Doctor).
 * In the TARDIS, Clara fiddles with the console's settings. The Doctor does not appear to object, suggesting Clara knows what she is doing.

Story notes
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Ratings

 * BBC One Overnight: 4.13 million
 * BBC America Overnight: to be added

Filming location
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Production errors

 * When the Doctor, Clara, and Osgood arrive at the TARDIS, the Doctor is a few feet away from it. In the next shot, he is standing right next to it.
 * As the Doctor enters the TARDIS, Bonnie is standing to Osgood's left. However, in the next shot, Bonnie and Osgood have switched places.

Continuity

 * The painting of the First Doctor in the UNIT Safehouse opens to reveal a safe. (TV: The Zygon Invasion)
 * Kate Stewart explains that she survived her encounter with a Zygon by firing "five rounds rapid," a phrase often used by her father. (TV: The Dæmons et al)
 * The naval surgeon who invented the anti-Zygon gas Z-67 is named Sullivan. (TV: Terror of the Zygons, The Zygon Invasion) The Doctor refers to him as an imbecile, just as his fourth incarnation once did. (TV: Revenge of the Cybermen)
 * The battle helmet of a Mire can be seen in the Black Archive. (TV: The Girl Who Died)
 * The Doctor recalls the intense pain of his experiences in the Last Great Time War. Furthermore, the Osgood Boxes are directly based off the Moment to reflect the way his wartime self struggled not to use its destructive potential. (TV: The Day of the Doctor)
 * Bonnie, having taken the form of Osgood, wears a facsimile of the Seventh Doctor's costume, with a duffel coat. (TV: The Curse of Fenric)
 * The Doctor tells Osgood he once created an invisible watch, a possible reference to the watch he used to avoid being detected by the Skovox Blitzer. (TV: The Caretaker)
 * The Doctor mentions the Last Great Time War when Bonnie accuses him of not understanding war, telling her he has fought in a bigger war than she will ever know.
 * Clara performs a "dream check" to gauge the state of her reality when she wakes up. (TV: Last Christmas)

DVD releases
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Blu-ray releases
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