Continuity mistake: After Joe hangs up on Moira, if you look at Wolverine in the background you will see that his face is colored yellow. (00:17:30)
Continuity mistake: When Proteus possesses the truck driver, the truck driver's wristwatch disappears in one shot. (00:15:10)
Continuity mistake: When Wolverine, Rogue and Beast are approaching Proteus in the Blackbird, in the first shot you can see through the windows that Wolverine is wearing a jacket. When the shot changes, the jacket is suddenly gone. (00:13:05)
Continuity mistake: During Xavier's flashback, Jean Grey goes from wearing her current (as of the show's broadcast) uniform while training in the Danger Room to her original "Marvel Girl" uniform when Amelia is leaving the mansion. Additionally, when Xavier is talking to Amelia in the Danger Room's control room, he is in his usual hoverchair, yet when Amelia is leaving the mansion, he is in a regular wheelchair. (00:05:25)
Continuity mistake: After Moira and Banshee are knocked back into the wall by Proteus, the amount of rubble around them changes between shots. (00:02:15)