Continuity mistake: There are two continuity errors regarding the final shot of Wolverine in this episode. Firstly, his arms are colored yellow. Secondly, his costume has magically mended itself after being torn to shreds by his mutation earlier in the episode.
Continuity mistake: After Magneto and Wolverine have been captured, when Wolverine is asking Magneto what is going on, the perspective of the shot makes it look like Magneto is looking down on Wolverine from a considerably taller height when they are both standing on a level floor. Additionally, the square slabs that make up the floor become smaller.
Continuity mistake: For the first half of this episode, Magneto is wearing a red dress-shirt with a black tie under a dark gray trenchcoat. After he is captured by the High Evolutionary, he is suddenly wearing his usual red and purple costume. Even if Magneto brought a change of clothes with him, it's extremely unlikely that the High Evolutionary would change his clothes for him.
00:03:40 - 00:12:40Phaneron
Continuity mistake: The style of the lettering on Magda's gravestone changes after the goat-woman runs away from Magneto. There is also a stone that was next to the grave when it is first shown that has suddenly disappeared in the same shot of the goat-woman running away.
00:09:10 - 00:09:45Phaneron
Continuity mistake: When Bova is bringing the baby twins to Django and Marya's house, the arm she is carrying the respective twin in changes depending on the shot. When she is first shown walking towards the house, she is holding Wanda in her left arm and Pietro in her right. When she is walking up the steps to the door, she is carrying Pietro in her left arm and Wanda in her right. When the shot changes after Django opens the door, the twins have switched arms again, and then again when she hands the babies to Django and Marya.