Continuity mistake: When Carly is telling Graydon Creed to leave her alone, her head is tilted towards her right shoulder. When the shot changes, she is facing straight. (00:15:57)
Other mistake: After Rogue knocks Gambit over, Gambit is in the foreground and Rogue is in the background. Despite this, the heel of Rogue's right boot appears in front of Gambit's left foot. (00:06:32)
Factual error: Whenever the comatose Carol Danvers is shown in her hospital bed, she is wearing a pink turtleneck. A coma patient wouldn't be dressed in their own personal clothing. It could obstruct doctors and nurses in an emergency. She would be wearing a hospital gown. (00:09:19 - 00:20:45)
Continuity mistake: When Rogue first wakes up from her nightmare, the X emblem on her chest is red. A couple of shots later, it is black. (00:05:15)
Character mistake: In the establishing shot at the farmers market, when the camera pans all the way to the right, there is a booth advertising roasted nuts, and "roasted" is misspelled as "roasteo." (00:03:20)
Continuity mistake: When Rogue collapses to her knees in front of Cyclops, the X emblem on her chest is colored red, when it should be black. Additionally, the X emblem is missing from the middle of Cyclops' belt. (00:06:55)
Continuity mistake: When Rogue is flying towards the torch section of the Statue of Liberty, the flame portion of the torch is missing, and then appears in the next shot. (00:08:33)
Continuity mistake: When Mystique is telling Wolverine, Cyclops and Gambit that they stole something very important from her, the sclera of Gambit's eyes are white, when it should be black. (00:10:36)
Continuity mistake: When Cyclops, Wolverine and Gambit are evading the fire lion that Pyro created, Cyclops hops over a blue-green car. A couple of shots later, the car is now brown. (00:10:56)
Continuity mistake: In the flashback of Rogue's father disowning her, when he says he's ashamed to be seen with her, the number of stripes on the flag on his hat decreases from six to four in the same shot. (00:13:08)
Continuity mistake: When Ms. Marvel first appears, her reflection is through the front window of the plane that Rogue is stealing. The lightning bolt design on her outfit and the red sash around her waist are not reversed in the reflection like they should be. (00:14:11)
Continuity mistake: When Rogue is visiting the comatose Carol Danvers in the hospital, Danvers' hair is parted down the middle and her bedsheets go all the way up to her neck. A couple of shots later, she has a lock of hair going down the middle of her forehead, and her sheets only go up to around her armpits. (00:20:17)
Continuity mistake: When Rogue walks by Carol Danvers' hospital room, you can see a nurse in the open space between the open door and the door frame. When the shot changes, the nurse is now standing in front of the open space, and would have been at least partially obscured by the door in the previous shot if she was standing in the same place. (00:10:11)
Continuity mistake: When Rogue and Ms. Marvel crash-land into the ground, Rogue pushes Ms. Marvel to the side, with Ms. Marvel's hair being near the edges of the hole in the ground. When the shot changes, the edges of the hole are still in shot, but Ms. Marvel's hair is nowhere to be seen. (00:15:31)
Time Fugitives: Part 2 - S2-E8
Continuity mistake: Bishop is shown trying to disperse the crowd at the quarantine site. When Cable appears on the rooftop ready to snipe him, Bishop is shown walking among the crowd. When Cable relents, Bishop is back trying to disperse the crowd. (00:06:15)
Time Fugitives: Part 2 - S2-E8
Continuity mistake: When Bishop dodges Cable's gunfire, behind him are a couple of kiosks that are across the street (they actually look like they are floating on the buildings they are in front of). When Bishop flees, the kiosks are now on the same side of the street as him. (00:03:05 - 00:03:32)
Time Fugitives: Part 2 - S2-E8
Continuity mistake: When Bishop is saying "It's time I lost that guy, once and for all," his mustache is suddenly thicker than previously shown. (00:07:56)
Time Fugitives: Part 2 - S2-E8
Continuity mistake: When Cyclops is saying "Don't worry, we'll stop them," the communication device on his bandolier is colored yellow, when it should be red. (00:16:27)
Time Fugitives: Part 2 - S2-E8
Continuity mistake: When Cable and Wolverine are battling in the chambers, the floor tiles change color from yellow to gray. (00:12:34)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When the Blackbird is shown recording the hearing, you can see Graydon Creed standing in front of the podium. When the shot changes to the hearing in the chambers, Creed is suddenly standing behind the podium. (00:14:32)
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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