Bloodlines - S5-E6
Continuity mistake: When Rogue is talking to Wolverine through her watch communicator, in the closeup shots the watch is shown to be around her glove, on her wrist. In the wide shot, the watch is either around her sleeve just beneath her glove or it has disappeared entirely. (00:09:00)
Bloodlines - S5-E6
Continuity mistake: When the Friends of Humanity member answers the door after Jubilee knocks, the floor is shown to be made up of square slabs. After Nightcrawler knocks him out, the floor has changed to a completely solid finish. (00:07:55)
No Mutant Is an Island - S5-E4
Continuity mistake: When Sarah resuscitates Cyclops, they are by the edge of the swimming pool. When the shot changes to Cyclops blasting through the screen door, the pool is nowhere to be seen, nor is the puddle of water that was under Cyclops in the previous shot. (00:16:10)
No Mutant Is an Island - S5-E4
Continuity mistake: The layout of the living room in Killgrave's house varies depending on the shot. Sometimes the half-circle couch is next to a staircase and sometimes it is not. The piano is also in a different spot on the floor each time it is shown. There are also chairs that appear and disappear throughout the scene. (00:14:55)
No Mutant Is an Island - S5-E4
Continuity mistake: When Cyclops is talking to Rusty outside the orphanage, the sign for the orphanage is much smaller than what it was shown to be in a previous scene. (00:07:35)
No Mutant Is an Island - S5-E4
Continuity mistake: When Cyclops throws his uniform on the ground, it turns into a dark gray color and the yellow paraphernalia attached to it disappears. (00:03:40)
Continuity mistake: When the X-mansion is shown at the end of the episode, the landscaping around it is different than what was shown early in the episode. When the mansion was first shown, there is a shrub in the shape of a circle on the lawn across from the mansion, but at the end of the episode, the circle-shaped shrub has turned into some bushes. The bushes and trees around the mansion are also different looking and at the far side of the mansion the shrubs have grown taller. Additionally, when Wolverine is walking away from the mansion at the end, a hedge-wall has appeared next to the mansion. It's actually common for the landscaping outside the mansion to vary drastically from episode to episode. This is the first time I noticed it changing within the same episode. (00:04:25 - 00:19:25)
Revealing mistake: When Rogue is shown tearing off the first portion of the submarine's hull, her feet are missing. (00:17:55)
Continuity mistake: When Omega Red is wrapping the metal around the Storm, the portion of the metal that is protruding from Omega Red's grasp alternates between being brown and white in the same shot. (00:16:30)
Continuity mistake: The mini-sub that Storm docked onto the hull of the nuclear submarine disappears and reappears throughout the rest of the episode. (00:07:20 - 00:17:45)
Continuity mistake: The number of "rows" on the purple devices on Omega Red's face varies throughout the episode, sometimes even changing quantity in the same shot.
Factual error: When Omega Red is shown a photograph of Hawaii, the island of Niihau is missing, and Kauai is too close to Oahu. (00:03:15)
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 Beast says to Warlock "We are at your disposal," Magneto is suddenly clean-shaven. (00:16:35)
The Phalanx Covenant: Part 2 - S5-E2
Revealing mistake: When Forge says "That's where we'll begin our assault," his mustache disappears from his face. (00:14:50)
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)
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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