The One With the Sharks - S9-E4
Revealing mistake: While Monica and Rachel are talking about Chandler's "jollies to Jaws" Rachel's wearing a colorful flowery top, and after Joey walks in just as Monica takes her seat at the table in the closeup, it's Jennifer Aniston's stand-in, wearing a blue top, who is seated beside Monica. And Rachel's hair is waivy in the flowered top, but straight in the blue top. (Viewed in widescreen).
Partners in Danger Chapter 6: The Awakening - S4-E6
Continuity mistake: When Morbius is battling Spider-Man and Black Cat on the rooftop, his red eyes are colored white in a couple of shots.
Continuity mistake: When Tony and Rhodey are talking to Bill Clinton, the stripes on the knot of Clinton's tie, from left to right, are blue, red, blue, and red. It then changes to red, blue, red, and blue when Clinton is asking Tony about his satellite systems. (00:04:32 - 00:05:26)
The Origin of the Fantastic Four: Part 1 - S1-E1
Continuity mistake: When Johnny slouches down on the couch, the black 4 on a white circle on the chest of his uniform suddenly becomes a white 4 on a black circle. (00:16:33)