Continuity mistake: Gambit's sleeves turn from black to pink when Bella Donna reveals to him that she double crossed the Thieves Guild. (00:13:25)
Continuity mistake: When Bella Donna is saying the Assassins are prepared for the tithe, a man with long green hair is behind her on her left. When the shot changes, he appears to be standing between her and Gambit. When the shot changes again and Bella Donna is stroking Gambit's hair, he is nowhere to be seen. (00:14:16)
Continuity mistake: When Gambit pushes Bella Donna over, she is on his left, and there is a tree stump on his right (out of shot). When the shot changes, she is up against the tree stump. (00:14:25)
Continuity mistake: When Pierre is telling the Assassins that they betrayed the Thieves, he raises his left arm and points his finger at them, and then lowers his arm back down. When the shot changes, his left arm is raised again. (00:15:00)
Continuity mistake: When the Thieves and Assassins guilds begin to skirmish, they start by trying to regain the weapons that Jean Grey telekinetically confiscated from them. A couple seconds into the fight and most of the weapons have disappeared altogether. (00:15:20)
Continuity mistake: When Rogue flies back towards Gambit and Bella Donna, Bella Donna is standing behind Gambit. When the shot changes, Bella Donna is standing in front of Gambit. (00:15:35)
Continuity mistake: When the External is emerging from the water, the Thieves Guild's tithe box is missing from its respective tree stump. In the next shot, it is back in place. (00:16:30)
Continuity mistake: When the External states the Guild of Thieves have dishonored the tithe, both the Thieves' and Assassins' tithe boxes are missing from their respective tree stumps. (00:17:10)
Continuity mistake: When Gambit places Bella Donna's ring on the ground, she is nowhere around it. When the shot changes, the ring is suddenly right next to her. Note: this mistake may only apply to the DVD version of the episode, as the version of the episode on Disney+ does have Bella Donna there when Gambit sets the ring down. (00:18:50)
Continuity mistake: The size of the hole beneath the trap door in the Thieves Guild's mansion changes. When Wolverine, Rogue and Jean Grey are shown falling down it, it is easily large enough for the three of them to fall down without bumping into each other. When we see the hole in the ceiling after Rogue destroys the wall that was falling on her, the hole is barely large enough for one person to fit through. The hole also moves closer to the back corner of the room, whereas it appeared to be closer to the back-center of the room once they landed.
Continuity mistake: The orientation of Gambit's mini-jet respective to the Blackbird changes. When the Blackbird first lands, the mini-jet is perpendicular to it. When Wolverine, Rogue and Jean Grey go over to inspect the mini-jet, it is suddenly parallel to the Blackbird.
Continuity mistake: Shortly after Wolverine, Rogue and Jean Grey enter the Thieves Guild's mansion, they fall down a trap door. However, the trap door is not there when they first enter the mansion, instead only appearing in the shot where they step on it.
Continuity mistake: In Gambit's flashback it is shown that the chosen one from the Guild of Thieves is banished to a "darkness never-ending" for breaking the covenant of the tithe. However, the same character can be seen later in the episode fighting alongside his fellow guild members.
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Cable is telling his teammate that they aren't retreating, his hands are on her shoulders. When the shot changes, his hands are no longer on her shoulders. (00:02:45)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Cable is watching his teammate get sucked into the temporal cyclone, his eyebrow is the same silver color as his hair, when it should be black. (00:03:49)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Bishop is shown returning to his original timeline, he is wearing the temporal band on his right arm. However, when he was sent back to his timeline at the end of the episode Days of Future Past: Part 2, he was not wearing the band because Rogue tore it off his arm and crushed it, which is what caused him to be sent back in the first place. (00:05:08)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: Throughout the episode, Bishop's goatee alternates between fully covering his chin and having a small spot of exposed skin beneath the soul patch. Sometimes there is even the outline drawn of the exposed skin beneath the soul patch, but it is colored the same as the goatee. (00:05:10 - 00:20:05)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Bishop returns to the year 2055, his shoulder pads are yellow. When he is approaching Forge, the shoulder pads are now the same blue color as the rest of his outfit. (00:05:12)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Bishop is shown returning to the year 2055, he looks out the window to a see a pristine looking city, and claims his intervention in the past to be a success. This is a contradiction to Bishop's return when it was originally shown at the end of the season 1 episode Days of Future Past: Part 2, in which he appeared in a run-down city and remarks that everything looks the same as it did when he left. (00:05:15)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Forge is first shown standing in front of the tube containing Wolverine's skeleton, the skeleton is incorrectly shown to be around 7 feet tall (Wolverine is only 5'3"). A couple of shots later, the skeleton is now shown to be more accurately sized. (00:05:19)
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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