Continuity mistake: When Storm shoots lightning at the missiles, it is yellow. When the shot changes, it is blue. (00:19:40)
Other mistake: When Cyclops is turning on his communication device to talk to Storm, his fingernails have been drawn on his gloved hands. (00:18:50)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Jubilee rings the doorbell at the end, it is black. When the shot changes, it is now gray. (00:20:36)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Cyclops first blasts the Sentinels in the factory, the part of his bandolier around his communication device is incorrectly colored red. (00:18:15)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Gyrich both enters and exits the White House exercise room, the file folder under his arm is the size of a briefcase. When he angrily throws the folder, it is now the standard file folder size. (00:14:45 - 00:15:17)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When the pool hall patron is pleading Cyclops to put his glasses back on, the yellow patch on his vest turns red. (00:14:20)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Wolverine is walking towards his jeep after leaving the pool hall, his jeep looks more like a truck. Additionally, the car parked next to him is light blue, but then is red when Wolverine is climbing in his jeep. (00:14:23)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Rogue begins to siphon off Wolverine's energy, her headband is incorrectly colored red. (00:11:58)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Storm shoots a bolt of lightning at a Sentinel after Cyclops tells Wolverine to pull back, the lightning is incorrectly colored red (her lightning boots are otherwise shown to be yellow). (00:11:12)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When the heroes are shown running away from the Mutant Registration Center, right before the Sentinels show up, Beast is right behind Morph. When Morph gets blasted by the Sentinels, Beast is now nowhere near Morph and shown to be running alongside Gambit and Cyclops. (00:09:51)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Wolverine is out driving his jeep, in one shot, the windshield is missing. (00:09:47)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Wolverine is tearing off the roof of Cyclops' car, the sun roof is incorrectly colored red. Additionally, Wolverine's jeep is parked next to Cyclops' car, but is not visible when he is tearing the roof off. (00:09:13)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Jean removes Cerebro and collapses to her knees, the chair she was sitting in disappears when the shot changes, as does the large roundtable and chairs in the center of the room. Additionally, two red stripes suddenly appear on Cerebro after Jean sets it on the floor. (00:07:42)
Night of the Sentinels: Part 2 - S1-E2
Audio problem: When the tower guard is saying "Put me down, you flying freak," his mouth is not moving. (00:06:54)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Trask is approaching Gyrich, the desk Gyrich was sitting at extends beyond his body, and his hands are resting on it. When the shot changes, Gyrich is standing in front of the desk, and his hands are down at his sides. (00:05:06)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Gyrich's face is first seen as he is talking to Jubilee, you can see a wall to his right. A few shots later, you can see a Sentinel is standing to his right, and there is not a wall anywhere near him. (00:04:27)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Gyrich is telling Jubilee that he wants to ask her about the mutants that helped her at the mall, the microphone is up to his mouth. When the shot changes to him tapping his right index finger on the desk, the microphone is nowhere near his mouth. (00:04:27)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Storm is saying "We must destroy every registration file in this area," Beast is standing behind her. When the shot changes, he is standing in front of her. Additionally, Beast's black eyebrows are incorrectly colored blue in one shot. (00:03:51)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: At the beginning of the scene where Morph is impersonating a commanding officer, a guard is shown with a golden-brown colored name tag that turns green as he moves towards the camera, and the writing disappears. (00:03:29)
Night of the Sentinels: Part 1 - S1-E1
Audio problem: When Cyclops is saying "Okay Storm, do your thing," his mouth movement does not match the dialogue. (00:18:31)
Answer: Chris Potter, the original Gambit voice actor, did indeed quit the role in the 4th season. His last episode was The Phalanx Covenant Part 1 so it seems reasonable that Fox would limit the use of the character even though it was recast. It doesn't appear that Potter left the role due to animosity, he stated in an interview that he wished to play Gambit in the first live action X-Men film.
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