Fine Feathered Finks (1) - S1-E3
Revealing mistake: After the huge rooftop umbrella is launched onto the street there's a small umbrella hanging from its handle, and when Batman uses his Batarang to swing towards the huge umbrella's shaft, his stunt wires are visible. (00:18:45)
Continuity mistake: When Robin has the idea that Riddler placed two other riddles hidden in the legal documents, Robin holds the papers up with his raised right hand, but in the next shot the documents are being held up in Robin's left hand. (00:13:45)
Revealing mistake: At the start, when Joker has sprung himself from prison, there are three shots of the giant spring, and the wires holding up the platform at the top are visible. In the third shot, one of the wires even glistens for a moment as it moves. (00:02:35)
Smack in the Middle (2) - S1-E2
Continuity mistake: When Fake Robin takes Riddler's wheel to drive, the shot cuts to the Batmobile. It appears that Robin is a passenger, but he is supposed to be Riddler's prison service.
Smack in the Middle (2) - S1-E2
Factual error: The mammoth is filled, according to the Prime Minister of the Republic of Moldavia, with "used postage stamps from ancient kingdom of Moldavia." Postage stamps are a 19th century invention, not something an 'ancient kingdom' would have used. (00:17:20)
The Penguin's a Jinx (2) - S1-E4
Revealing mistake: When the Penguin orders his hook to be fired, it barely moves, then suddenly takes off. If you look closely at the hook before it moves, the connecting wire used to pull it out of frame can be seen. (00:13:30)
Smack in the Middle (2) - S1-E2
Continuity mistake: During the fight, the breather Batman has disappears, but suddenly returns afterwards. (00:21:50)
Smack in the Middle (2) - S1-E2
Revealing mistake: After Batman tosses his Batarang up to get to Molly, the lifting wire attached to him is plainly visible.
He Meets His Match, the Grisly Ghoul (2) - S1-E16
Factual error: Dick Grayson's mini-camera, which is sitting on the bar, takes several shots of the villains from impossible angles several feet away from its location. And though he conspicuously places the camera in plain view, the crooks never notice it. (00:10:40)
He Meets His Match, the Grisly Ghoul (2) - S1-E16
Continuity mistake: When Batman surprises Joker and his henchmen in the gym, his shadow is on the wall behind them, his cape spread out and forming a menacing bat shape. But when the shot cuts to him and Robin, Batman's cape isn't spread. He's standing with his arms down. (00:20:40)
The Riddler's False Notion (2) - S1-E32
Revealing mistake: The film can Riddler hands Van Jones supposedly contains his silent movie. But the hollow thump, obvious light weight and lack of the distinctive rattle a film reel would make, all reveal that the can is actually empty. (00:19:00)
The Purr-Fect Crime (1) - S1-E19
Continuity mistake: Catwoman dangles an unconscious Robin face-down on a tilting board over her tiger pit. He comes to, pulls his arms free and clutches the board's edges. In the next, closer shot, he's unconscious again, wakes up and repeats the grabbing-the-board motion. (00:07:30)
The Purr-Fect Crime (1) - S1-E19
Continuity mistake: Catwoman curls up with a large red book. In the master shot, she's holding and reading the lefthand pages. In the close-up insert, her hands are suddenly grasping the righthand pages instead. Cut back to master shot, and she's again holding the left side of the book. (00:08:30)
The Penguin's a Jinx (2) - S1-E4
Revealing mistake: While listening to Batman and Robin plan, the camera is close enough to the Penguin to see the prosthetic nose is differently colored. (00:07:00)
Fine Feathered Finks (1) - S1-E3
Other mistake: If the camera in the Penguin's cell is hidden and stationary, then the video taken from the cell should all be from the same angle, but not only does much of it move along with the Penguin as he paces, it also is much closer and at a lower angle. It only reverts back to being hidden when he notices it.
Revealing mistake: In the recap, in the wide shot where Mr Freeze uses his freeze gun on Batman and Robin, you can see they are stunt doubles.
Death in Slow Motion (1) - S1-E31
Audio problem: In the distance shot, when Robin responds to Batman's call, his lips don't move, but you hear him.
Not Yet, He Ain't (2) - S1-E22
Continuity mistake: When the Batmobile is blocked by the second police car, it's stopped on an angle, and almost touching the car. When the Penguin commandeers the Batmobile, it's sitting correctly on the road, so that it can be driven easily without really needing to back up.
Other mistake: When Mr. Freeze is moving through the room evaluating the diamonds, the tanks on his back can be fire extinguishers. There is no way that the "weapon" attached by hose to them will work, as the handles have to be squeezed to discharge.
The Joker Goes to School (1) - S1-E15
Audio problem: As Susie deposits a dime in the coffee machine, the camera starts to pan down towards the opening where the cup will appear. You hear the cup then the quarters fall, but you can see the cup full of quarters is already in place before the sound is made.
Answer: There were three well-known actors who played Mr. Freeze, each one a different height, weight, and physique. As these were notable guest stars, the costume designers would adapt the costume to best fit each actor who likely would want to avoid comparisons to the other Mr. Freezes, incorporate their preferences, as well as refresh the look, rework whatever didn't work in previous versions, and so on.
raywest ★