Factual error: The show is obviously full of cartoonish hyperboles; particularly amusing the notion that the "tempering furnace" in the back of Penguin's shop reaches 10'000° (I assume Fahrenheit), which would make it hotter than the surface of the Sun and able to melt any known metal on Earth. Bit of an overkill to temper umbrella ribs. (00:24:10)
The Riddler: You and your trained, exploding shark.
The Penguin: How was I to know they'd have a can of shark-repellent Batspray handy?
Trivia: Originally, Batman villain Two-Face was going to appear in this show and was going to be portrayed by Clint Eastwood. Two-Face's backstory wouldn't have him as an attorney who had acid thrown in his face but instead have him as a news anchor who would have a stage light exploding resulting in his injuries and his transformation into a criminal.