Plot hole: Hippolyta tells Hawkgirl of Aresia's background of being born in the outside world, the war in her country and right up to her drifting to the shores of Themyscira. It would be impossible for her to know anything of Aresia's background as in part two, it's explained that the captain of the ship who saved Aresia died shortly after reaching Themyscira and therefore would not have been able to tell Hippolyta anything.
Injustice For All (1) - S1-E18
Continuity mistake: When Trina runs to her dad, he gets down on two knees. In the next shot, when Superman and Flash arrive, he is seen kneeling on three legs.
Injustice For All (2) - S1-E19
Other mistake: Unless he escaped prison, it makes no sense for Copperhead to be in the police van with the other Secret Society members. You can see him sitting there across from Solomon Grundy and The Shade.
Other mistake: Aquaman is animated with two hands and no hook for a single shot while swimming underwater at the end battle in the Arctic.
Continuity mistake: When the Thanagarian commander addresses the delegates in the locked room, there is a guard standing in front of the door, next to the projection. In the next shot, he has moved to the side by the wall.
Other mistake: At the beginning, when Java is filming, you can see that the image on the lens is meant to be a reflection or a mirror image, as it should be. It appears that Mason's left hand is on fire when it's actually his right hand. However, the "23" on the building isn't a reverse image.
Legends (1) - S1-E16
Continuity mistake: When we first see Music Master's car, it's mostly in the street. In the next shot, more than half of it is on the sidewalk. And then, when the cops show up, it's nowhere to be seen even though it was parked in front of the stairs.
The Brave and the Bold (1) - S1-E12
Continuity mistake: When the car crashes into the café Flash is at, you see it hit the counter and fall back down, and nothing is on the hood. When Flash asks the guy if he's okay, there's a burger on a pretty flat part of the hood. In the next shot, it's gone, and the hood is completely crumpled up.
Continuity mistake: When Aresia's shown as a child in flashbacks in the ocean she goes from being barefoot to wearing black shoes in several shots.
The Brave and the Bold (1) - S1-E12
Other mistake: Flash brags about having beaten Gorilla Grodd to two girls at the beginning of the episode, but then later is surprised by talking gorillas and seemingly meets Grodd for the first time.
Suggested correction: Flash never talks about Grodd. He's telling a story about Solomon Grundy.