Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Beast is leaping through the corridor, the black X with the black rectangular border on a red background on his waistband briefly becomes a red rectangle on a yellow background with no X. (00:02:37)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When the guards are waiting to ambush the heroes, all of them have red hair. When Storm blows them all away with a gust of wind, one of them now has black hair. (00:02:45)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Wolverine shuts the door Strom is opening, the handle is pointed at 6 o'clock. When he starts sniffing the guards' gun oil, the handle is now pointed at 7 o'clock. Wolverine's hand also goes from being under the handle, to the center of the door. (00:02:50)
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 2 - S1-E2
Continuity mistake: When Morph fools the guards into going into a different room, you can see him transform back into his regular self in silhouette, and his jacket suddenly goes down below his knees, similar to Gambit's, whereas Morph's jacket stops at his waist. (00:03:44)
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: When Storm is saying they need to destroy all the hard files, the file cabinet has no lock on it. When the shot changes, a lock has appeared. Additionally, the upper part of Storm's sleeve is the same color as her skin. (00:04:02)
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 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 Gambit says "You wanna play with Gambit? Here, take a card!" the glove on his right hand is missing, then is suddenly back on his hand when he says "House wins." (00:05:50)
Night of the Sentinels: Part 2 - S1-E2
Character mistake: When Beast is uploading the virus to delete all the mutant files from the computer, Storm destroys the monitor with a bolt of lightning and says they have run out of time. Destroying the monitor wouldn't magically erase the files. While she may not know that, Beast definitely would, so at the least, he should have asked her to destroy the computer tower and hard drive as well. (00:06:13)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: After Cyclops tells Gambit to blow up the fence and Rogue flies into frame, her headband and the patches on her uniform that are all normally black are now red. Additionally, the black encircled X on a red background on the left side of her chest is now a yellow X on a red background. (00:06:35)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: Immediately after Storm, Wolverine, Beast and Morph exit the Mutant Registration Center, Beast and Wolverine are shown to be running alongside Gambit and Cyclops. However, mere moments later, Gambit is shown to be blowing up a security fence so Storm, Wolverine, Beast and Morph can rendezvous with Gambit, Cyclops and Rogue. (00:06:45 - 00:07:20)
Night of the Sentinels: Part 2 - S1-E2
Continuity mistake: When Rogue catches the security guard from the collapsing tower, he has black hair. When she is flying through the air with him as well as when she dumps him in the grass, his hair is red-orange. (00:06:50)
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 Professor X is asking Jean what's wrong, the upper corners of his eyebrows are not filled in properly. They are the same color as his skin. (00:07:41)
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
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 Cyclops is standing in the doorway to the garage, the communication device on his bandolier is entirely red, when there should be a black X on it as well. (00:09:42)
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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