Continuity mistake: The Friends of Humanity members have patches on the backs of their shirts/vests/overalls that say FOH, but when the two members are checking on Wolverine in the alley, their patches read HOH. (00:07:00)
Continuity mistake: The metal tubes on Wolverine's gloves appear and disappear when he is talking to Jean Grey. (00:04:19 - 00:05:07)
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)
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)
Other mistake: When Jean is bringing a tray of food to Beast, the liquid in the glass is not oscillating. (00:09:38)
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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