Revealing mistake: When Batgirl hands Batman the rope, just as he tells her to concentrate on the Indian fakir command, above Batman's head we can see the glistening wire that will be used in the stunt. Then, after Batman and Batgirl have escaped the dungeon Robin rushes up and asks how they did it, and when Batman reiterates the Indian fakir command for Robin, we can see the wire attached to the rope. (00:15:55 - 00:18:05)
Surf's Up! Joker's Under! - S3-E10
Visible crew/equipment: After Batman and Robin head out to Joker's hideout, when it cuts to Joker upon his success at stealing all of Skip's talent and vigor, just as Joker says, "You know what this means boys, the surfing championship," we can see the shadow of the boom mic moving at the far right side of the screen. (00:09:50)
How to Hatch a Dinosaur (2) - S3-E9
Visible crew/equipment: While Batman and Robin are in Commissioner Gordon's office Barbara reports the theft of the Neosaurus egg, and when Batman suspects it's connected to the radium theft, he and Robin decide to use the Batcomputer at the Batcave. Just as the Dynamic Duo rush to Gordon's door the camera turns to follow them, and we can see filming equipment at the right side of the screen as it tries to move out of view. (00:09:55)
How to Hatch a Dinosaur (2) - S3-E9
Visible crew/equipment: After Egghead tells Olga he's planning a three-course meal for the Neosaurus consisting of Batman, Robin, and Batgirl, and for dessert - Commissioner Gordon and Chief O'Hara. Then it cuts to the Batcave as Batman talks about the Bat-geiger, and when the camera moves closer we can see the camera movement's reflection on the windshield, at the bottom right corner of the screen. (00:15:15)
The Unkindest Tut of All - S3-E6
Deliberate mistake: When Batman has figured out King Tut's plot to steal ancient Egyptian scrolls from the Gotham City Library, he and Robin rush away, and in the shot of the library exterior, the words "The New York Public Library" is quite noticeable above the entryway. (00:18:00)
Continuity mistake: Batgirl's outfit includes boots with kitten heels, but during the fight scenes the stuntwoman's boots have block heels. (00:19:45 - 00:21:25)
Ring Around the Riddler - S3-E2
Continuity mistake: When Batgirl finds Betsy with the huge magnet under the boxing ring Batgirl throws the rope around the lever, then as the rope pulls the lever down the rope slips off and falls, but in the next shot the rope is still up around the lever. (00:21:25)
Pop Goes the Joker (1) - S2-E57
Continuity mistake: After Oliver Muzzy congratulates Joker for his magnificent artwork and makes a deal with him, before Joker leaves the gallery he runs his finger across Batman's yellow emblem to sign his red artwork, but at GCPD HQ when they're discussing the matter, Joker's signature is completely different, it's now a capital "J" on Batman's yellow emblem. (00:06:45)
Caught in the Spider's Den (2) - S2-E56
Visible crew/equipment: In Commissioner Gordon's office, when Gordon and Chief O'Harah walk over to the Batphone so they can talk to Robin and get him to surrender, we can see the actor's white tape mark taped to the rug, just as Gordon removes the clear acrylic dome from the Batphone. (00:17:20)
A Riddling Controversy (2) - S2-E46
Continuity mistake: When Riddler and his baddies are at their factory hideout watching the news of their criminal coup on TV, in shots facing the TV the two rabbit ear antenna are fully retracted, but in shots from behind the TV the antenna are extended by approximately a foot. Later, there's a similar occurrence with the TV antenna, while Batman and Robin use the Batrope to climb the wall. (00:03:20)
Penguin's Disastrous End (3) - S2-E44
Visible crew/equipment: When Marsha is down to one veil she ends her dance, then as she and Aunt Hilda try to get away they're stopped by the love-sick sub-treasury guards, and there's a curved white chalk mark on the floor where Marsha stands. (00:12:05)
Penguin's Disastrous End (3) - S2-E44
Visible crew/equipment: At the sub-treasury, when the guards hear the sound of Marsha's music they turn towards her distraction then move closer, and curved white chalk marks are visible on the floor where the actors will stand, in this shot and a following shot. (00:07:20)
Penguin's Disastrous End (3) - S2-E44
Visible crew/equipment: While Penguin and his bumpkins are hiding out in Aunt Hilda's cave, Hilda tells darling Pengy he's lucky that she's soft hearted, and the two curved chalk marks are visible on the floor where Marsha and Penguin will stand. (00:03:45)
Penguin Is a Girl's Best Friend (1) - S2-E42
Continuity mistake: After Batman and Robin fight off the fake thieves, when Penguin threatens the Dynamic Duo with jail time for aggravated assault and malicious property damage, in his closeup Penguin holds the megaphone in his left hand and his cigarette is in his right hand, but in the next wide shot those items have switched hands. (00:02:45)
That Darn Catwoman (1) - S2-E40
Visible crew/equipment: When Pat Pending tells his valet, Rudy, that all his money is safer hidden in his mattress, Catwoman and her cohorts break in, then knock out Pending and Rudy. As Catwoman walks toward the bed there are two chalk marks visible on the floor, one of them at her feet. (00:17:20)
The Joker's Hard Times (2) - S2-E38
Revealing mistake: When Joker pays another visit to Commissioner Gordon and Chief O'Hara, Joker's holding his wand, and in the shots from outside the GCPD office window we can see the wire cable dragging behind Joker, which is attached to the wand and providing its power. During these shots, the actors' small white tape markers are also visible on the rug, beside the Batphone table. (00:03:00)
The Zodiac Crimes (1) - S2-E37
Revealing mistake: When Joker enters Commissioner Gordon's office at GCPD, he's pointing a wand at Gordon and Chief O'Hara. In the shot facing Joker when he lets go of the wand, the wires at both ends of the wand are visible. (00:01:15)
The Zodiac Crimes (1) - S2-E37
Continuity mistake: In Commissioner Gordon's office, after Batman uses his handy mini fire extinguisher to extinguish Joker's flaming 2-way spy device, when he walks over to Gordon's desk the mini fire extinguisher is in his left hand, but when it cuts to the closeup as he realises the significance of RAM, the fire extinguisher is suddenly in his raised right hand. (00:06:50)
The Zodiac Crimes (1) - S2-E37
Revealing mistake: After Joker's goons kidnap Crustash, the opera singer, Penguin tries to sneak off, and when Batman and Robin use javelins to capture Penguin, the glistening stunt wire attached to the javelin is visible in the wide shot. (00:18:15)
The Puzzles Are Coming (1) - S2-E31
Revealing mistake: While The Puzzler and his baddies are at Artemus Knab's penthouse, across the street from Commissioner Gordon's office, when Puzzler decides he will launch the plane himself, the wire attached to the top of the plane is visible. (00:01:15)
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 ★