Family Ties - S4-E17
Audio problem: When the High Evolutionary claps his hands, there is no corresponding sound. (00:08:25)
Family Ties - S4-E17
Continuity mistake: Quicksilver's neck is colored the same light-blue hue as his uniform when he says "The mutant who did this..." (00:07:45)
Family Ties - S4-E17
Revealing mistake: When the High Evolutionary is asking Scarlet Witch and Quicksilver to place their arms in his DNA scanner, his mouth looks like it is jumping off his face as he is speaking. (00:06:35)
Family Ties - S4-E17
Continuity mistake: When Scarlet Witch and Quicksilver first meet the High Evolutionary, Scarlet Witch's headgear alternates between being red and pink. (00:05:55)
Family Ties - S4-E17
Continuity mistake: When Bova is bringing the baby twins to Django and Marya's house, the arm she is carrying the respective twin in changes depending on the shot. When she is first shown walking towards the house, she is holding Wanda in her left arm and Pietro in her right. When she is walking up the steps to the door, she is carrying Pietro in her left arm and Wanda in her right. When the shot changes after Django opens the door, the twins have switched arms again, and then again when she hands the babies to Django and Marya. (00:02:30)
Continuity mistake: When Xavier is explaining to Wolverine the importance of vigilance, Beast can be seen directly behind him. When the shot changes, Beast is no longer standing behind Xavier. (00:18:25)
Audio problem: Wolverine's mouth is closed when he says "Man, the weird dream I just had." (00:13:35)
Continuity mistake: When Xavier is surrounded by a group of mutants in his subconscious, if you look at Quicksilver you can see that the colorist made his shirt flesh-colored. You can tell he is supposed to be wearing a shirt because the lightning bolt design is still going across his torso. (00:05:20)
Other mistake: When the Shadow King in his human form is passed out on the floor, his left hand appears to have at least six knuckles. (00:08:25)
Secrets, Not Long Buried - S4-E15
Continuity mistake: During the battle at the end, Cyclops uses the crystal statue he brought with him in the fight by throwing it into the air and uses it to refocus his optic blasts on a crowd of attackers. After the battle is over he gives the statue to Dr. Prescott without ever having retrieved it. (00:18:55 - 00:20:20)
Secrets, Not Long Buried - S4-E15
Continuity mistake: The mutants that have gathered for Solarr's speech are in different places throughout depending on the shot. (00:16:50 - 00:18:50)
Secrets, Not Long Buried - S4-E15
Other mistake: When the group of mutants are listening to Solarr's speech, in one continuous shot of ten of them that lasts at least four seconds, they are all standing completely still, not one of them moving a muscle, blinking or making the slightest adjustment in their facial expressions. (00:17:00)
Secrets, Not Long Buried - S4-E15
Audio problem: When Solarr, Chet and Toad are laughing at Cyclops, the sound of their laughter begins about a second before they actually start laughing. (00:11:45)
Secrets, Not Long Buried - S4-E15
Audio problem: After Cyclops crash lands, the shot changes to Watchdog observing the crash on his monitor with a voice-over saying "Scratch one trouble maker," except that the voice speaking is that of Solarr and not Watchdog.
Secrets, Not Long Buried - S4-E15
Other mistake: At one point after Cyclops ejects from his mini-jet, you can see that he is just floating in midair instead of descending back to the ground. (00:03:15)
Other mistake: After Rogue absorbs Wolverine's healing powers and purges the transformation spores from her system, she reverts back into human form including losing the tail that she grew. Given that the tail protruded from her backside, there should have been a hole in the back of her pants afterwards, yet there is none. (00:16:40)
Audio problem: When Wolverine says "I'm going to get this outta me!" his mouth is wide open for most of the line. (00:14:05)
Audio problem: With the exception of the last word in the sentence, Cody's mouth is completely closed when he says "They need us Rogue, just like I need you." (00:13:40)
Continuity mistake: When Gambit notices Cody on the monitor, the pink rectangular patches on his pants that are normally horizontal are now vertical. (00:10:30)
Factual error: Wolverine is able to call the mansion from a payphone without depositing any money, nor is he shown to be using a prepaid phone card or making a collect call. (00:09:40)
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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