Continuity mistake: Old Barry collapses next to Young Barry, and lies next to his waist. A shot later he lies next to his head.
Continuity mistake: At the lab, when Young Barry collapses, his head lies on a white tile and his hair is all messed. A shot later it lies on a coloured tile and it's not messed.
Revealing mistake: When the Barrys cross through the glass door, for a couple of shots, Young Barry's face is replaced with a non-realistic CGI face with features that don't match the face contour at all.
Continuity mistake: Young Barry forces Old Barry into eating broccoli, which he does in large bites. When Young retrieves the broccoli, it's uneaten.
Continuity mistake: When the movie begins, the way the barista holds his notepad changes between shots. (00:01:07)
Continuity mistake: When Batman and Falcone are pulled up, the case with the virus is open (you can see the bottles). When they are on the bridge, suddenly the case is closed. (00:12:29 - 00:13:00)
Continuity mistake: When Bruce is explaining about time travel issues to the Barries, the amount of sauce on the spaghetti changes between shots. The spaghetti in the bowl shifts as well, most noticeably when there's some right up on the lip of the bowl close to Bruce, which then disappears from another angle.
