Family Ties - S4-E17
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 - 00:12:40)