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 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)
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 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 1 - S2-E7
Continuity mistake: When Apocalypse is preparing to shoot an energy blast at Bishop and Wolverine, his left arm is angled downward with his palm facing the floor. When the shot changes, his arm is at a level angle, and his palm is facing the other side of the room. (00:19:23)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Apocalypse reveals himself, Bishop is standing next to Cyclops. When the shot changes, Bishop is standing by his lonesome. (00:18:37)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When the X-Men begin running towards the Friends of Humanity's headquarters, keep an eye on Gambit in the background on the left, and you will see his black gloves materialize onto his bare hands. (00:17:43)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Graydon Creed is testifying, the committee is seated at a table just a few feet behind him. When Beast takes the podium, Creed backs up several paces in line with the podium to almost nearly the wall. He couldn't get that close to the wall without stepping over the table. (00:14:34 - 00:15:30)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Bishop is saying he was trying to save lives, the strap running through Gambit's jacket sleeve is colored blue, when it should be the same brown color as the rest of the jacket. His left hand is also bare, despite the fact that he had been showing his gloves throughout the scene. (00:12:37)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When the quarantine sign is being stapled to the door, it is black and yellow striped, with an orange stripe running the opposite direction, and "Quarantine" written on the orange part. When the mob is trying to get into the building, the sign is now gray with a single yellowish-gray stripe running diagonally across it, and no writing. (00:10:14 - 00:10:44)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Storm is saying the man on TV is the one who attacked Jubilee at the mall, the portion of Wolverine's mask by his cheek is colored yellow, and the X within a circle on Rogue' chest as well as the stripes on her collar are colored red. All these things should be black. (00:10:31)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Beast is telling Jubilee she needs to eat more vegetables, the black and red middle section of his waistband turns blue. (00:09:08)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When the man in the electronics store is calling Jubilee a plague carrier, her purple jacket and black hair have been colored green and dark brown, respectively. (00:08:37)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When the man accuses Jubilee of giving the electronics store manager the plague, the manager's shirt has changed from yellow to gray. (00:08:24)
Time Fugitives: Part 1 - S2-E7
Revealing mistake: When the electronics store manager collapses onto the display stand, if you look closely, you can see the business cards he falls onto fly into the air before his head makes contact with the stand. (00:08:23)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Bishop returns to the year 2055, his shoulder pads are yellow. When he is approaching Forge, the shoulder pads are now the same blue color as the rest of his outfit. (00:05:12)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Cable is watching his teammate get sucked into the temporal cyclone, his eyebrow is the same silver color as his hair, when it should be black. (00:03:49)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Cable is telling his teammate that they aren't retreating, his hands are on her shoulders. When the shot changes, his hands are no longer on her shoulders. (00:02:45)
Continuity mistake: When Storm is reunited with Mjnari after purging Shadow King from her body, Mjnari has a tear coming out of the outside corner of his right eye. When the shot changes, the tear is gone. (00:16:03)
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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