Batman Gotham Knights

Trivia: The special transforming metal is shown to be of a weaker material strength than steel, as Penguin was able to cut through it with one swift tug against the edge of a shuriken.

Bullock: What's next? Bat-Hound. Ace the Bat-Hound was the canine crime-fighting partner of Batman and Robin, who debuted in Batman #92. Later, he was a regular member of the Justice Hounds in Krypto the Superdog, starting in 2003.

Barbara and Dick are the same age, and Dick is out of college. So it doesn't make sense that Barbara is still in college, and she wasn't in college during the run of the series.

This movie was made after Justice League during its second season, but they use the Batman Gotham Knights batsuit.

Batman's ears grow bigger and bigger till the end of the episode.

It's odd that Thorne would have no objections to Penguin hiring Bane, especially given that the last time Thorne and Bane crossed paths, (the original series episode "Bane") Bane was making plans with Thorne's aide, Candice, to overthrow Thorne and claim his holdings as their own.

Trivia: The tune that The Joker is whistling to when he's about to leave after untying Batman was "Rock a-Bye-Baby."

Trivia: Poison Ivy is seen in Arkham Asylum during the flashback to Harley Quinn's origins, meanining that this episode takes place at least after Poison Ivy's premiere episode, "Pretty Poison".

This episode takes place with the designs of Batman and the Joker from Batman Gotham Knights in Harley's flashback of how she became Harley Quinn. But at that time she was in Batman: The Animated Series which had different designs for them.

Trivia: The accident which transformed the Joker happened exactly seven years prior to this episode.

There's a continuity error after Killer Croc puts a hole in Penguin's table. Following shots show no hint of the hole, or even a mark on the table.

Trivia: This is the second time that Bruce Wayne is engaged. The first was in the Batman animated movie Mask of the Phantasm when Bruce was briefly engaged to Andrea Beaumont.

Trivia: Poison Ivy's convertible from the Batman: The Animated Series episode "Harley and Ivy" appears.

When the Hatter loses his disguise, his hair (as the clown) turns orange for a few seconds and then back to gray a few seconds later.

When Batman and Catwoman are in the Batmobile, you'll see that everything looks all blurry for a few seconds.

In the casino scene, Croc grabs all the money he can and runs. If you look closely, as he heads to the door, he is seen without the money. However, in the next scene, he is seen once again with the money.

Trivia: This episodes shows that Batman's cape and pouches on his belt have a lead lining. When Batman pulls out the kryptonite it did not affect Superman until after Batman pulled it out from his pouch in his belt and Superman did not feel the effects of it until after Batman pulled his cape out of the way.

When Croc shows Baby Doll the Daily Planet page about them, you can see a smaller heading saying "Supermans hands full," with a missing apostrophe.

Calender Girl: Beware the Ides of March! This phrase is taken from William Shakespear's play Julius Caesar. It refers to March 15th, the assassination day of the Roman dictator.

The animatronic dinosaur that attacks Batman and Batgirl is surprisingly intelligent, but more importantly surprisingly resilient. After bashing its head into a rockface, it shows no damage of any kind.