Basil Karlo was the original Clayface, an actor driven insane when he learns that a classic horror film he starred in is being remade without him. Matt Hagen, the second Clayface, is a treasure hunter transformed into a malleable clay-like form by a mysterious radioactive pool of protoplasm. The third Clayface, Preston Payne, is a S.T.A.R. Labs scientist suffering from hyperpituitarism.

Killer Moth is the first villain Batgirl encounters in Detective Comics #359 -- her debut story. While driving to a costume ball dressed as a female version of Batman, Barbara Gordon foils an attempt by Killer Moth to kidnap Bruce Wayne. Although Batman insists she give up crime-fighting because of her gender, Batgirl disregards his objections.

Alfred is an accomplished horticulturalist. He grows and breeds roses in the greenhouse at Wayne Manor and has even created his own breed of Rose -- the Pennyworth Blue.

The Riddler (played by Frank Gorshin) only appeared in 10 episodes of Batman. Catwoman appeared in 13, the Penguin appeared in 21, and the Joker appeared in 22 episodes.

After the Man of Steel broke Batman's back, Alfred took a nanotech pill that gave him super-strength and beat the snot out of Superman.

When Mortimer Drake found himself unable to purchase exotic valuables for his collection legally, he resorted to crime. Donning a costume resembling that of a Musketeer, he called himself the Cavalier.

Dr. Francine Langstrom took the same serum that transformed her husband into a bat-like creature. She called herself She-Bat.

Boneblaster has gloves that generate vibrations capable of shattering a human skull.

Medusa is a global criminal cartel with a mystic nature that is headquartered in Gotham City. Batwoman, under the employment of the DEO, has sworn to take it down.

The Terrible Trio was a team of three thieves who wore masks that represented three different animals: a shark, fox, and vulture.