Black Mirror

Arkangel - S4-E2

Continuity mistake: While mother and daughter are at the park, when the mother looks at the girl a train is passing on the tracks next to the park, but when the camera switches to the mother there is no train, then when it switches back to the girl the train is there again.

gazza2009

USS Callister: Into Infinity - S7-E6

Continuity mistake: The crew inside Nanette's head sees what she sees. In the hospital, when she looks in the mirror, they correctly see the reverse image of her face. She has a big wound on her right cheek, which should appear on the left when mirrored. In subsequent shots, however, the crew sees the wound on her right cheek, which is on the wrong side if they are seeing her image in a mirror. It's as if they recorded Cristin Milioti looking directly into the camera for these shots but forgot to flip the image. (01:22:10 - 01:23:41)

Vader47000

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Answer: It's a derogatory slang term made up for the show.

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