Continuity mistake: In this episode, I. M. Foreman's scrapyard is at the end of the alley next to Coal Hill School. In "An Unearthly Child," the scrapyard was far enough away from the school that Barbara and Ian take Ian's car to get there. Barbara also describes it to Ian as "there's a big wall on one side, houses on the other." If it was right next to the school, she would have mentioned "that scrapyard next to the school."
Continuity mistake: After The 10th Doctor marries Elizabeth they kiss. While they are kissing, the collar on his jacket gets turned up, from her point of view. The camera then switches to look at her from over his shoulder, then back, and now the collar is straight.
Continuity mistake: When the three Doctors have all just managed to stop Gallifrey being destroyed, The War Doctor shouts 'Thank you Bad Wolf Girl!' At this moment the Tenth Doctor's hair is spiked up and messy but then immediately in the next shot when he is next to Rose and he questions what The War Doctor just said, his hair is flat and neat again.
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Continuity mistake: At the end, when the Tenth Doctor steps into his TARDIS, there are three sets of cups and saucers on the side of the bench farthest from the TARDIS, and Clara's set in the middle of the bench, but as the TARDIS fades away, there are two sets on each end of the bench.
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