Mojovision - S2-E11
Other mistake: When Jean is trying to dodge Spiral's teleporting blast, she ends up tripping on a power cord running across the floor. An electronics store wouldn't have a power cord running across its floor for this very reason. They would be begging for a lawsuit if they did. Her foot is also closer to the wall in the first shot than in the second shot. (00:07:30)
Character mistake: When Carly expresses her relief to Beast that he is fine after he was attacked by the anti-mutant group, he incredulously asks her how she knew he was a mutant. Aside from the fact that the Friends of Humanity were openly calling him a mutant in her presence when they accosted him, Carly was shown touching Beast's hand earlier in the episode. Despite being blind, she would also know that Beast's fur-covered hands would be quite different from the hands of regular people she might have touched. Given these facts, Beast should not have been surprised that Carly knew he was a mutant. (00:03:25 - 00:08:40)
Mojovision - S2-E11
Character mistake: The label on the bottle that Major Domo gives Mojo reads "Mojos aniacid," when it should read "Mojo's antacid." (00:03:20)
Other mistake: When Jean is bringing a tray of food to Beast, the liquid in the glass is not oscillating. (00:09:38)
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)
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)
Other mistake: When Rogue is hovering above Muir Island, she pulls out a book to confirm she's in the right place, and the picture of Muir Island in her book shows it to have three smaller islands on its south side. When she lowers the book to look at the actual island, only the large island shown on the southwest side in the book is there. She's only hovering a few hundred feet above the island, so even though the other two islands were small, they should still be visible. (00:09:48)
Other mistake: When Rogue begins flying towards Cable after disarming him, she is only about 30 feet away from him. As she is flying towards him, he takes the time to pull a plasma grenade from his belt, pull out the pin with his mouth, and then throw it at her. In the time it took him to do all of that and given the speed at which Rogue was flying towards him, she should reach him well before he could throw the grenade at her. (00:18:05)
Other mistake: When Gambit, Storm, and Jubilee get into the back of the taxi, you can see the window seat behind the driver is unoccupied, which would suggest the three of them are occupying only two of the backseats. (00:12:51)
Other mistake: When Wolverine is walking around the camp after Sabretooth attacked it, he doesn't leave any footprints in the snow, even though Sabretooth's footprints are there. (00:14:52 - 00:15:36)
Factual error: When Xavier is getting ready to get back into his hoverchair, you can see him raise himself to his knees, even though he is a paraplegic. (00:13:43)
Night of the Sentinels: Part 1 - S1-E1
Character mistake: When Jubilee wakes up in the infirmary, the sphygmomanometer on her wrist has been applied over her gloved hand, which could cause a false reading. Beast is the X-Men's resident doctor, so presumably he's the one that applied it to her, so he should have known to remove her gloves first for more accurate readings. (00:08:24)
Night of the Sentinels: Part 1 - S1-E1
Factual error: When the Sentinel reaches out to try to grab the dog, it smashes its hand against the grass and produces numerous cracks in the lawn with a metal clanging sound. Neither of these things would happen. The grass would have a bunch of divots in it, and the sound would be similar to something heavy falling in dirt. (00:02:09)
Continuity mistake: When Magneto destroys the wall of Beast's prison cell, the night sky is visible. When Magneto is asking Beast why he isn't escaping, another wall is now there instead of the sky. (00:03:21 - 00:04:06)
Other mistake: When the helicopters are attacking Magneto, they are firing their guns at him, and then he destroys them, at which point you can see the occupants parachuting away at the same time the helicopters explode. There's no way they could have been operating the guns and then jumping out of the helicopter to safety in one second. (00:06:01)
Night of the Sentinels: Part 2 - S1-E2
Character mistake: When Beast is uploading the virus to delete all the mutant files from the computer, Storm destroys the monitor with a bolt of lightning and says they have run out of time. Destroying the monitor wouldn't magically erase the files. While she may not know that, Beast definitely would, so at the least, he should have asked her to destroy the computer tower and hard drive as well. (00:06:13)
Family Ties - S4-E17
Other mistake: This series is in the same continuity as the other Marvel animated series that aired around the same time - Spider-Man, Iron Man, The Incredible Hulk, and Fantastic Four - by virtue of each aforementioned show crossing over with at least one of the other shows. However, in Iron Man, Scarlet Witch has an Eastern European accent, and in this episode she has an American accent.
The Phoenix Saga (2): The Dark Shroud - S3-E4
Other mistake: After the shuttle crashes into the Upper New York Bay, the X-Men escape the wreckage and swim up to the surface, with Wolverine being the first one to appear. Given that Wolverine's skeleton is coated with a heavy metal, not only should he not be the first one to surface, he should actually sink instead. (00:04:06)
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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