The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: The final shot of the episode shows Jubilee among the group of X-Men. However, she was not present in the group shots that preceded this one. (00:20:40)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When the group is standing together in a circle at the end, Xavier is sort of in the center of the circle and Rogue and Storm are several feet to his right. When the shot changes, Rogue and Storm are suddenly right next to Xavier. (00:19:25)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Jean Grey hugs Cyclops, her hands are colored blue. (00:19:25)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Xavier and the others are approaching Cyclops, Storm, Rogue and Wolverine, Magneto is shown wearing his helmet and Gambit is shown wearing his trenchcoat. When it changes to an overhead shot of the group, Magneto is no longer wearing his helmet and Gambit is no longer wearing his trenchcoat and his normally-black headgear is colored blue. (00:19:20)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Beast says to Warlock "We are at your disposal," Magneto is suddenly clean-shaven. (00:16:35)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Xavier is first shown in his containment bubble, he is shown with his hands resting at the center of his hover-chair with his left hand on top of the right. When the shot changes, his hands are suddenly separated and at the sides of his chair. (00:14:00)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Cameron Hodge says to Wolverine "The X-factor is ours," his left hand is on Wolverine's chin. In the very next shot, his hand is suddenly no longer on his chin. (00:13:45)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Cameron Hodge says "Wolverine gets a gold star," Wolverine's normally red belt is colored yellow. (00:13:40)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Cameron Hodge is duplicating Gambit's mutant power, his arm is yellow. When the shot changes, his arm (or at least his hand) is flesh-colored. (00:13:35)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: The Phalanx-infected Gambit goes from being yellow and black in one shot to having the appearance of his usual color scheme in the very next shot. (00:13:30)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When the group is talking to Cameron Hodge's Phalanx facsimile, sometimes Forge is behind Beast on his left, Mr. Sinister is behind Forge on his left, and Warlock is behind Forge and Mr. Sinister. Other times Warlock is behind Beast on his left and Forge and Mr. Sinister are not in the shot. (00:10:45 - 00:12:45)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Magneto says "To do what?" he is wearing his purple gloves. When he is shown in closeup, he is not wearing any gloves, just a red long-sleeve shirt. (00:08:35)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: When Amelia says "The Earth is in danger from an alien infestation," Mr. Sinister's normally-blue boots are colored red. (00:08:35)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: After the Phalanx captures Banshee, the bubble he is encased in disappears when the shot changes. He also goes from being turned away from Moira to facing her direction. (00:07:40)
The Phalanx Covenant: Part 2 - S5-E2
Continuity mistake: The Phalanx-civilian that is dressed like a biker that attacked Beast and the others outside the restaurant in Milford Township, PA at the end of the previous episode is suddenly outside the Empire State Building at the very beginning of this episode. (00:02:00)
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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