The Origin of the Fantastic Four: Part 1 - S1-E1
Continuity mistake: When Sue turns invisible for the first time, Ben Grimm's hair alternates between being gray and auburn. (00:07:46 - 00:09:08)
The Origin of the Fantastic Four: Part 1 - S1-E1
Continuity mistake: When the Fantastic Four are first shown on Dick Clark's show, Johnny is seated on Sue's right and Reed is seated to her left. A couple of shots later when Dick Clark is telling them what his telethon viewers really want to know, Johnny and Reed have swapped sides. (00:02:06)
The Origin of the Fantastic Four: Part 1 - S1-E1
Continuity mistake: When Sue is holding up the book for Dick Clark, her right hand is on the bottom of the book on the spine side, and her left hand is in the upper right corner. When the shot changes, her right hand is suddenly closer to the top-left corner. (00:02:18)
Superskrull - S1-E7
Continuity mistake: When the noxious slime slug is approaching Super Skrull, it spews its slime at his feet. When the shot changes, the slime is gone. (00:05:00)
The Origin of the Fantastic Four: Part 1 - S1-E1
Continuity mistake: When the shuttle crash-lands back on Earth, it is twilight. When the group exits the shuttle, it is suddenly dark outside.
Suggested correction: There's no way of knowing how long they were in the shuttle after it crashed, what happened to them, or what they might have been doing. It seems it's just meant to show a passage of time.