Iron Forged in Fire: Part One - S1-E1
Continuity mistake: When Tony says he has to stop the train from hitting the building’s power generators, the camera zooms in on a train car at the entrance of Stark Tower by the tracks that has the generators on it, and there are two Stark International employees standing on the balcony beside it dressed fully in white. Only a couple seconds later, Tony flies down there to cut off the train, and suddenly the two guys have vanished. (00:18:00)
Triumvirate of Terror! - S3-E8
Continuity mistake: When Joker zaps Wonder Woman and her mother, they are both standing in front of their thrones and fall forwards. But when Wonder Woman stands back up, her mother, still unconscious, is suddenly off to the side and behind the thrones. (00:11:35)
Continuity mistake: When Cad Bane is taken into custody by a clone trooper, the trooper changes from a shock trooper to a standard trooper between shots. (00:14:40)
Continuity mistake: When Magneto uses his powers to create a hole in the metal wall, the edges of the wall surrounding the hole are smooth. When the shot changes, the edges suddenly look crumpled. (00:17:16)