Continuity mistake: When Flash plays tag with Faust ("Now you see me, now you don't"), there is a brief shot in which he rushes at Faust - but not inside Hyppolita's palace, but in some high-tech laboratory. Obviously a shot from some earlier series, since the coloring and style are different from the Justice League's.
The Catwalk - S2-E12
Continuity mistake: T'Pol says she has never been camping, but she went in "Strange New World."
Episode XXVII - Chicken Jack - S3-E1
Continuity mistake: Jack's father the emperor is a young man when he defeats Aku. At the conclusion of the movie, he greets his pregnant young wife. At the start of "The Beginning" movie, Jack is a very young boy, both his parents are well past middle age-and Jack has no sisters or brothers to explain the gap.
Continuity mistake: The back passenger tire blows and they come to a stop, You can see the tire is still inflated. But when they show a close up of the tire its burst at the tread. (00:21:20)
Crime of the New Century - S1-E9
Continuity mistake: In the fight scene at the start of the episode, Jesse knocks one of the GS agents into the water - in subsequent shots he has disappeared.
Continuity mistake: When a rock breaks through the glass and hits Bob, he drops his pipe. He hops outside, leaving his pipe in the floor. When he's approaching the Sheriff, he has the pipe in his mouth again.