
The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: When the robot is released from the closet, it knocks the doors off their hinges. When Puppet Master escapes through the secret door, the closet doors are nowhere to be seen on the floor. (00:10:45)

The Origin of the Fantastic Four: Part 2 - S1-E2
Revealing mistake: When Puppet Master mentally calls out to the prison warden, some of the lines of his mouth detach from his face and float in midair briefly before disappearing. (00:07:39)

The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: After the warden is possessed by Puppet Master, the lighter gray hair by his temples is suddenly the same slightly darker shade of gray as the rest of his hair. (00:07:46)

The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: When Ben Grimm says "I'm me," after reverting back to human form, his left hand index finger is colored brown. (00:05:48)

The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: When Ben Grimm puts his hands on Alicia's shoulders, the fingers on his right hand change color. (00:06:34)

The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: When Johnny is asking who the Puppet Master is, Ben's right hand is on Alicia's left shoulder. When the shot changes, his hand is suddenly behind her back, which he then raises and places on her right shoulder. (00:06:38)

The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: During the jailbreak scene, the heavyset inmate is shown wearing ripped pants that go just below the knee, which becomes a speedo when Slash punches out the guard. (00:03:06)

The Origin of the Fantastic Four: Part 2 - S1-E2
Continuity mistake: When the reporter is getting an interview from the warden, her hair is suddenly less poofy than it was in the previous shot. (00:03:18)
Answer: Gleaned from the Internet: Much of the negative reaction was due to the poor, simplistic, and outdated quality of the animation where the characters moved stiffly and clumsily through scenes. There were also some obvious animation compositing gaffs. The animation colors were also criticized as being overly bright and cheery and out of character to the established story's darker tone. The broad humor of the first season was replaced by a more mature narrative between the characters.
raywest ★