The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Jubilee rushes to Xavier to tell him about the black hole sun, Banshee's cape is suddenly missing. (00:06:32)
The Phoenix Saga (4): The Starjammers - S3-E6
Continuity mistake: When Cyclops and Corsair are boarding D'Ken's ship via the moving sidewalk, the speed at which the moving sidewalk is propelling them forward varies depending on the shot. (00:15:03 - 00:15:29)
The Phoenix Saga (4): The Starjammers - S3-E6
Continuity mistake: When D'Ken is berating Erik the Red for being defeated by the X-Men, he is sitting on a throne. He then stands up and calls Erik the Red a fool, and when the shot changes, the throne disappears. (00:09:47)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Gladiator is landing at Cassidy Keep, Jubilee, Gambit, Wolverine and Banshee are spaced apart. When the shot changes, they are standing side by side. (00:16:43)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Wolverine is first shown detecting scents in Xavier's room, the glove on Gambit's right hand is the same color as his flesh. (00:11:25)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Juggernaut throws Xavier out the open window, Xavier is shown going through roughly the middle area of the open space. When he is flying through the air from Banshee and Moira's perspective, he is falling from a higher position. (00:05:02)
Continuity mistake: When Pyro is unmasking Ms. Marvel, the wristband on Blob's right arm is missing. (00:15:37)
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)
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 is trying to disperse the mob, the circular patches on his shoulders are red with yellow borders, and a thin circle design is within the red circle itself. Moments later when he throws Wolverine off himself, the red circles are now blank, and their borders are black instead of yellow. (00:11:00 - 00:11:50)
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: When Beast is saying that the virus was genetically engineered, the chin area of Bishop's black goatee is the same color as his skin. (00:13:01)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Graydon Creed is first shown giving his testimony, in an overhead shot, we see the front row of the benches in front of him are filled with civilians. When the shot changes, the X-Men are now occupying the row on Creed's right. (00:14:34)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When the camera is panning across the X-Men as they are listening to Graydon Creed's testimony, Wolverine's arms are folded, and you can see the top portion of the blue glove on his left hand is the same yellow color as his outfit. (00:14:27)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Moira and Banshee are alerted to Xavier in distress, the building with his room is several yards away from the edge of the cliff. However, when Banshee dives to save Xavier from falling to his death, the edge of the cliff is now only a few feet from the building. (00:02:46 - 00:05:02)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Moira and Banshee's kiss is interrupted by Xavier's scream, his room is directly behind them. Moments later when Moira and Banshee are running to his room, it has moved significantly to the left of where they were just kissing. (00:02:44)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Moira is telling Banshee that Xavier has given everything for his students, she has her left hand placed on Banshee's right arm, and her right arm is down at her side. Then when she remarks that she thinks she's the only friend Xavier has, she is running her fingers through her hair. When this scene was shown in the previous episode however, she is grasping Banshee's arm with both of her hands, and she never runs her fingers through her hair. (00:02:26)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Continuity mistake: When Xavier is looking out at Banshee and Moira from the window to his room, he is facing the window directly. When the shot changes, his left profile is now facing the window. (00:17:31)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Continuity mistake: When Xavier lands his plane on the Muir Island helipad, the nose of the plane is directly to the right of Banshee. When the shot changes, Banshee is now standing a few feet in front of the nose. (00:17:01)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Continuity mistake: When Dark Xavier knocks Cyclops into the wall, it leaves a small hole. When Cyclops gets up, the hole is now larger. (00:14:47)
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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