Continuity mistake: When Storm is watching TV with her arms folded, her left hand shows her index and middle fingers touching. When the shot changes, it is her middle and ring fingers that are touching. (00:08:40)
Continuity mistake: When Archangel is lamenting his actions, the communicator devices from Storm's uniform are missing. (00:20:15)
Continuity mistake: When the three horsemen are climbing onto their mechanical horses, Famine's horse is in the middle, and Pestilence's horse is on the right. Once all three have all been individually shown to be mounting their horses, Famine and Pestilence have swapped places. (00:06:08)
Continuity mistake: When the cameraman drops his camera, it lands on the ground and rests on a rock so that the lens is at a slanted angle. When the shot changes to the camera's point of view, it shows Apocalypse right side up, when he should be slanted to correspond with the camera. (00:10:14)
Continuity mistake: When Storm turns on the TV, much of the Eiffel Tower is in the background. A couple of shots later, the reporter is standing in front of a building that would obscure much of the Eiffel Tower, and is also suddenly standing next to a news van. (00:07:47)
Continuity mistake: When Rogue is interrogating Mystique, she is standing in various places next to the platform depending on the shot. (00:13:45 - 00:14:08)
Continuity mistake: When the statue is about to fall on Wolverine, his arms are colored yellow. (00:16:25)
Continuity mistake: When Apocalypse is saying "Go forth my horsemen," his right arm is raised up. When the shot changes, his right arm is immediately at his side. (00:06:30)
Continuity mistake: The trap door that Apocalypse uses to escape suddenly disappears once Wolverine tries to claw his way through it. (00:19:35)
Continuity mistake: When Warren Worthington is strapped to the table, the arm and leg restraints are gold. After the table has been lowered, the restraints are now silver. (00:02:29 - 00:02:56)
Continuity mistake: When the Lady Gardener kills the rose, it droops down almost to the surface of the table. When the shot changes, it is now only drooping about midway down its vase. (00:03:56)
Continuity mistake: When Rogue, Cyclops, Jean Grey and Xavier are first shown in the bar, the glasses in front of Rogue and Cyclops contain green liquid. When Cyclops is consoling Rogue, the liquid is now blue. When the shot changes, the liquid in the glass in front of Rogue is now green again. (00:03:49 - 00:04:18)
Continuity mistake: When Mystique, disguised as Warren Worthington, first walks into the bar, the walls are purple. When she is saying "You don't have to be mutants," the walls are now red. When the shot changes, they are back to being purple, and a framed picture has appeared over her left shoulder. (00:04:18)
Continuity mistake: When Storm turns on the TV, the news reporter's microphone has a yellow 7 on a black circle. A couple of shots later, the black circle is now also yellow. (00:07:49)
Continuity mistake: When Xavier is briefing the X-Men about Apocalypse, Storm is on Xavier's left, and as the camera pans up and to the left, you can see no-one is around her. When the shot changes, Cyclops and Rogue are suddenly next to Storm. (00:10:21)
Continuity mistake: When Rogue positions the platform that Mystique is shackled to upright, Mystique's feet are close to touching the floor. A couple of shots later, her feet are suddenly several inches higher. (00:14:08)
Continuity mistake: When the tank is falling through the hole in the bridge, the tank's gun barrels are pointed towards the water. When the shot changes to the tank landing in the water, the gun barrels are pointed towards the sky. (00:09:40)
Continuity mistake: When the conference chairman is first shown at the podium, there are five microphones attached to it. A few shots later, there are only four. (00:07:55)
Continuity mistake: When the news reporter is first shown talking about the World Peace Conference, he has one blue eye and one brown eye. For all remaining shots he is in, both of his eyes are blue. (00:07:40 - 00:08:35)
Continuity mistake: When Storm is teasing Gambit for damaging the pool table, she is holding a television remote in her left hand, which is yellow (Storm doesn't wear gloves). A couple of shots later, she is holding the remote in her right hand (she had time to transfer the remote to her other hand, so no mistake there), which is colored correctly. (00:07:35)
Answer: It appears a number of factors led to its demise. It was originally intended to air for 65 episodes, but its popularity extended that. However, there were continual production quality problems, issues regarding whether the content was suitable enough for children, as well as financial considerations that finally led to it being ended.
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