Continuity mistake: In Season 2 Episode 22, Model Behavior, Woody has gotten his braces off. However, in this episode, he has braces back on again.
Other mistake: The battle droids - including the commando droids featured here - habitually have two broad fingers and a thumb. So how can a commando droid squeeze itself completely into clone trooper armor without its broad fingers tearing open the gloves, since it can't separate its fingers?
Triumvirate of Terror! - S3-E8
Continuity mistake: After breaking through S.T.A.R. Labs, Lex blasts Superman through a wall, leaving a human sized hole. He was on his back in the hole. When we see Superman again, the hole is shaped differently, and he is suddenly on his stomach. (00:06:50)
Iron Forged in Fire: Part One - S1-E1
Continuity mistake: When Tony and Rhodey are talking to the guard, trying to get into Stark International, there is a shot showing a woman walking away from them in a black skirt. A couple of shots later, the woman has disappeared and instead a couple is walking towards them holding hands. (00:07:20)
Continuity mistake: When Wolverine enters the lab to talk to Beast, Beast is sitting in the chair on the middle-right. After he shows Wolverine that he searched for Kitty and Colossus, he is now sitting in the chair on the middle-left. (00:14:02)