'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: In the first shot of Rogue, Storm, Wolverine and Gambit watching Professor X's holographic message, Gambit's trenchcoat is colored yellow and his hair is colored black. The animators must have confused him for Jubilee at first, because those are the colors of her jacket and hair. (00:12:50)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Morph is first blasted by the Sentinels in the flashback, it leaves a small hole in the chest area of his uniform. When Mr. Sinister approaches him, the hole is now much larger, exposing his entire chest and abdomen. (00:07:47)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Wolverine is slicing off the roof of the car, he is first shown to be running his claws down the center. A couple of shots later, he is cutting a square-shaped hole into the roof, with no tears going down the center. (00:12:17)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Morph is watching Wolverine leave the mansion in his jeep, the jeep is missing in the first shot. (00:13:40)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Wolverine is driving away from the mansion, there is a tree inside a circle hedge that wasn't there in previous shots. (00:13:40)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Rogue wakes up after Gambit kisses her, there is a pink pillow on the sofa. When the shot changes to her inadvertently kinetically charging the armrest with his powers, the pillow has disappeared. (00:16:23)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Wolverine leaps out to engage the Danger Room doppelganger of Cyclops, his claws are extended. When he lands, there is a closeup shot of his right hand, and his claws are suddenly retracted, and he extends them again. (00:02:16)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Wolverine stabs the Danger Room doppelganger of Cyclops, he is running him through in the center of the chest. When the shot changes, he is now stabbing him through the left collar bone area. (00:03:04)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Beast is saying "What's in a name," he and Cyclops are standing on the right side of the red carpet, and Gambit is standing right behind Beast. A couple of shots later, Beast and Cyclops are now standing on the left side of the red carpet, and Gambit is now standing several feet away by the door. (00:05:32)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When Morph, disguised as Wolverine, bumps into Rogue, she is holding a steaming mug of coffee. When she tells him she is going to the rec room to take a nap, she is holding the mug sideways, with no steam coming from it. The camera was on her face for most of this sequence, so she couldn't have finished drinking it, and there is no spilled coffee on the floor, so the mug should still be steaming. (00:14:09)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When the bartender begins saying "I bet you know the President," she is standing by Beast's left shoulder. When the shot changes, she is face to face with him. (00:11:13)
'Til Death Do Us Part: Part 1 - S2-E1
Continuity mistake: When the Friends of Humanity are getting in the car to escape from the fight, the backseat area of the car is shown to have window louvers that are the same red color as the car's body. When the shot changes and shows the car from the interior, the windows are plain glass. (00:12:09)
'Til Death Do Us Part: Part 1 - S2-E1
Other mistake: When Gambit is attempting to kiss Rogue at the wedding, the man standing over Gambit's right shoulder has no face. (00:04:03)
Continuity mistake: When Beast is kissing Carly on the forehead, his left eyebrow goes from being black to blue to black again. (00:20:20)
Continuity mistake: When Wolverine is infiltrating the Friends of Humanity's headquarters, and later when he is talking to Graydon Creed in their auditorium, some shots show him wearing a gold wristband on his left wrist, and other times he is not wearing one. (00:06:20 - 00:14:30)
Continuity mistake: When Dr. Bohlson is starting to remove the bandages around Carly's eyes, he is not wearing a stethoscope. After Beast interrupts the procedure and walks up to Carly, Bohlson is suddenly wearing a stethoscope. (00:11:05)
Continuity mistake: Just before the mirror shatters, Beast's reflection shows him burying his face in his left hand. When the shot changes, it is his right hand. (00:09:55)
Continuity mistake: When Beast is looking through the photo album, it reads "Family Photos" on the front cover. When he tosses it to the floor, the "Family Photos" writing has now moved to the back cover. (00:09:35)
Continuity mistake: The word-plate on the eye clinic director's office door is silver when first shown. A few moments later, it is the same color as the door, and the lettering isn't as bold. (00:07:45)
Continuity mistake: When Beast and Dr. Bohlson enter Carly's room, there is no breast pocket on Dr. Bohlson's labcoat. A couple of shots later, his labcoat now has a breast pocket with two tongue depressors in it. (00:02:25)
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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