- Canon Foreigner: The majority of them - especially the one-shots were original to the show, as the Batman comics of the time had a much shallower Rogues Gallery to draw from. The villains who aren't are a decidedly small list: Riddler, Penguin, Joker, Catwoman, Mr. Freeze, Mad Hatter, and the Clock King. In recent years they've gotten more references and cameos in "mainstream" Batman media, but none have really become outright Canon Immigrants like Harley Quinn.note
- Card-Carrying Villain: The lot of them love being bad, and only about one or two have given even semi-serious thought to reforming.
- Complexity Addiction: Not just in their love of oversized deathtraps, but also in most of their criminal schemes. Do you really need to dig up a store of gunpowder from the American Revolution just to blast your way into the Federal Reserve? Even Lampshaded by the villains themselves.Joker: Oh why don't we just heist a bunch of dynamite?Catwoman: Far too simple, Joker. And not half as much fun as being devilishly clever... after all, we're not common thieves.
- Criminal Mind Games: In true Silver Age tradition, many of them love sending taunting clues to Batman and/or the police. Really, on this show every villain is an honorary Riddler.
- Cut Lex Luthor a Check: Zany, physics-breaking inventions are practically their stock-in-trade - seriously, the Joker once invented pills that could rewind time - but none of them ever even consider using their intelligence legally (or, indeed, using it for anything meatier than petty extortion and bank robbery).
- Everyone Calls Him "Barkeep": Almost all of them are known solely by their supervillain handles (Penguin even ran for Mayor with nothing but "Penguin" on the ballot). Even the ones who do have real names only get it brought up once or twice.note
- Gang of Hats: How their Mooks are inevitably tailored (usually with monikers to match). Some of the more iconic ones - Joker's guys are usually in white berets and red vests, Catwoman's wear cat-eared beanies and tiger-striped shirts, and Penguin's wear bowler hats and black jumpers.
- Genre Blindness: Every week they trap the Dynamic Duo in what they think is an inescapable death trap, certain they are done for. And then they are completely shocked when they turn up alive.
- Paid Harem: Rare is the arch-villain who doesn't have at least one pretty little moll hanging by at all times (even some of the villainesses got in on it!). Indeed, the '66 Gotham may well be the Trope Codifier, at least where Batman works are concerned.
- Special Guest: 99% of the villains were given a "Special Guest Villain(ess)" or "Extra Special Guest Villain(ess)" credit. The lone exception to this was Michael C. Carmel's Colonel Gumm — guest heroes Green Hornet and Kato, got the special guest star credit instead and Carmel was included with the supporting cast in the closing credits.
- Villain Team-Up: Most famously in the movie, where the main four became a full-blown Legion of Doom. The four would later reunite in Batman: Return of the Caped Crusaders; though unlike the last time, Catwoman found herself betrayed by her male comrades in crime. Subsequent seasons featured several smaller ones:
- Season 2 had Joker and Penguin, Catwoman and the Sandman, and finally Penguin and Marsha, Queen of Diamonds.
- Season 3 had Riddler and Siren, Penguin and Lola Lasagne, Egghead and Olga, Queen of the Cossacks, and finally Joker and Catwoman.
- The digital comic really picked up the ball and ran with it, since there's no more need to worry about casting budgets.
- Where Does He Get All Those Wonderful Toys?: Batman may be a millionaire, but it's a complete mystery where the villains get funds for their gadgets, deathtraps, furnishings for their lairs etc. Special mention goes to Penguin in the movie, where he somehow finds the funds to buy war surplus submarine directly from the military.
- Would Hurt a Child: None of these guys (and girls) have any compunction about sticking high-schooler Robin in their deathtraps right alongside Batman (and they're certainly not unaware of his age, since most of them almost exclusively call him "Boy Wonder").
Main Villains - aka "The United Underworld"
The most recurring adversaries of the Dynamic Duo — the Riddler, the Penguin, the Joker, and Catwoman. Normally the work independently, but on one occasion they teamed to take over the world with the help of an instant dehydrator, developed by Big Den Distilleries and designed to be an instant whiskey maker that they decided to put to - in Riddler's words - "more universal use".
- Domino Mask: Standard-issue for both Catwoman and Riddler.note The movie also saw Joker and Penguin donning them.
- Falsely Reformed Villain: A very common scheme with all of them (unlike the one- or two-shot villains, who are much more likely to be full-on outlaws). Penguin is especially fond of pretending he's "gone straight" for the millionth time.
- Four Is Death: In the Movie, the one time they team up they rake up a rather disturbing body count thanks to the instant dehydrator (don't worry most of the victims got better — those poor guinea pigs), considering none them had any body count to speak off on the show itself; frequent attempted murder on the Dynamic Duo, non withstanding.
- Take Over the World: Their goal in the movie.Batman: They're working together to take over...Chief O'Hara: Take over what, Batman? Gotham City?Batman: Any two of them would try that!Commissioner Gordon: The whole country?Batman: If it were three of them I would say yes. But four? Their minimum objective must be... the entire world.
- Villainous Friendship: Clash of egos aside, they get along quite well ... when things are going their way. The minute they turn south they immediately argue and bicker.
The very first villain of the show to be introduced. Riddler is criminal genius who loves riddles and mind-games.
- Breakout Villain: Not only was Gorshin's performance responsible for making the character an A-list villain, after previously being only a minor villain in the comics but he was the villain from first season with the most appearances.
- Demoted to Extra: After the first season, because Gorshin was holding out for more money. One second-season story was rewritten for a Suspiciously Similar Substitute called the Puzzlernote , and then the producers replaced Gorshin with John Astin for one story. Gorshin came back for one final episode in Season Three. As such he has the fewest appearances of the main four.
- Evil Laugh: A famous high-pitched out of control giggle.
- The Friend Nobody Likes: The last issue of the digital comic indicates he's become this to the other villains, who refuse to invite him to their big convention because they expect him to leak everything to Batman. He does it anyways.
- Iconic Outfit: The question mark three-piece suit; designed by Gorshin himself since he hated wearing the spandex and wanted an alternate outfit when possible.
- The John Astin version also produced an iconic accessory - the question-mark cane.note
- Near-Villain Victory: Out of all the villains, Riddler came the closest to defeating Batman. All he had to do was trick Batman into making a false arrest and then proceed to file a wrongful arrest lawsuit, not for the money but because Batman would be forced to reveal his identity in court. The lawsuit was eventually dismissed, because Riddler didn't show up to court for personal reasons, but damn if he didn't come close. And this was all in the first episode.
- Oral Fixation: Had a habit of chewing on his knuckle or finger when he was nervous or thinking.
- The Rival: In the Movie, to the Penguin, constantly butting heads with him and being openly contemptuous of his leadership direct in contrast to Joker and Catwoman:"That miserable, waddling mountebank of a bird! He couldn't finish a bag of popcorn!"
- Symbol Motif Clothing: Interestingly, his spandex outfit is relatively light on the question marks; it's his suit that's really dotted with them.
- Trope Codifier: Gorshin's performance heavily set the tone of the character for decades, including the now iconic question mark suit.
The second villain to be introduced. Penguin is a self-styled "aristocrat of crookery" fixated on umbrellas and birds.
- Animal Motif: Take a wild guess.
- Arch-Enemy: Any of the big four would be a contender for this to Batman, but the Penguin is matched only with the Joker for the most (on-screen) battles with Batman. It's also notable that the Evil Plan in the movie was mostly if not entirely his.
- The Captain: An evil variant. In the Movie, the United Underworld are equal partners on land, but in the submarine Penguin is the one in charge.Joker: Don't sound so bossy, if you please!Penguin: My dear sir, as the poet says: "On land, you may command, at sea it is me!"
- Cool Boat: In the movie, his pre-atomic submarine modified to look like a penguin complete with war surplus torpedoes.
- Good Smoking, Evil Smoking: Like his comic-book counterpart, rarely seen without his signature cigarette holder.
- Guttural Growler: Interestingly, of the big four he has easily the hoarsest and most "thuggish" accent (partly due to Meredith, an ex-smoker, having to constantly smoke for the role).
- High-Class Glass: He wouldn't be the Penguin without it.
- The Leader: Of the villains in the Movie providing the henchmen, the hideout, the equipment, and the submarine for a quick getaway though Riddler often challenged his leadership.
- Man of Wealth and Taste: Well he certainly does his best to cultivate the image and unlike other incarnations he does manage to pull it off.
- Nice Hat: He wore a very nifty purple topper.
- Parasol of Pain: Well, he'd hardly be the Penguin without one (or twelve) of these on hand like in "Fine Finny Fiends".
- Purple Is Powerful: What made this Penguin stand out from other incarnations is rather than wear all black he wears a purple top hat and a matching bowtie.
- Sesquipedalian Loquaciousness: Befitting his image of man of wealth and culture, he always talks in an elaborate manner.
- Social Climber: A lot of his "gone straight" schemes (especially the "marry into rich/important family" ones) seem baked into this mindset, fitting his snobbish demeanor.
- Trope Codifier: Just like Gorshin, Meredith's Penguin influenced the character for decades — interpretations of Penguin being a deformed social outcast are a fairly modern idea.
- Verbal Tic: His signature "waugh waugh" - another byproduct of Meredith's reaction to all those cigarettes.
The third villain to be introduced. A crazy harlequin with a love of demented pranks.
- Arch-Enemy: As mentioned above, he's tied with the Penguin for the most (on-screen) battles with Batman. Modern-day continuations like the digital comic and Batman: Return of the Caped Crusaders take this for granted and go out of their way to make things more personal between him and Batman.
- Axe-Crazy: Averted, this Joker may have a few screws loose but he's not considered criminally insane and as such is sent to Gotham State Penitentiary for 10-20 years whenever he's arrested. note
- Beware the Silly Ones: Outwardly the most goofy and approachable of the big four, but he'll go to some truly horrible lengths just to spring his henchmen from jail (a fact that, funnily enough, subverts the character's usual Bad Boss reputation).
- Evil Counterpart: His solution to beat Batman's insufferable utility belt? Invent his own! It was so effective, it had the Dynamic Duo on the ropes ... until Joker got cocky enough to switch an exact replica of his belt with Batman's as a prank. Cue the Dynamic Duo reverse-engineering to discover it's secrets leading to his defeat.
- The Fagin: "The Joker Goes to School" has him corrupting high-schoolers into joining his gang and even trying to murder one of them, when she was no longer useful.
- For the Evulz: Most of the villains, will have some monetary goal in their schemes, but the Joker is the one who will do evil schemes just because — best shown with his counterfeit currency scheme. He goes to the trouble of buying a comic book publishing house so he'll have ready access to ink and printing presses, he builds an elaborate human-like robot to infiltrate Gotham's main bank as a teller so he can pass out counterfeit cash .... that's intentionally left blank on one side.
- Knows the Ropes: One of his more frequent gadgets is the "trick streamer" - party confetti that instantly knots itself around any unfortunate victim.
- Large and in Charge: If Batman's Bat-slide from "The Joker Goes to School" is to be believed, he stands a monstrous six-foot-six.note
- Monster Clown: Zig-zagged. While he does put the Dynamic Duo in the obligatory death trap, this Joker isn't really into mindless killing as part of his schemes (except that one time he tried to murder a high-schooler henchgirl), preferring elaborate capers based on whatever gimmick taken's his fancy.
- Psychopathic Manchild: Of course, none of the arch-villains can be accused of being especially mature (or stable), but some of his interests - like out-surfing Batman - are just flat-out weird.
- Out of Focus: In the Movie; all of the villains get a chance to shine except Joker, who's just sort of there by virtue of being one of the main four.
- Real Men Wear Pink: This Joker didn't wear purple, he wore a very distinct and iconic pink suit. Although the lighting would make it look like purple.
- Trope Codifier: Zigg-zagged. While no would dare say that Romero gave a bad performance, his successors in the role namely: Jack Nicholson, Mark Hamill, and the late Heath Ledger with their more sardonic and darker take on the character are more established in the public consciousness.
- You Gotta Have Blue Hair: Zig-zigged - Romero donned a comics-faithful green wig for the role, but lighting issues frequently meant it would be photographed as every color except green. In older stills from the show especially, it could look brown, blonde, or even red.
The last of the main four to be introduced. Catwoman is world-class burglar with an insatiable greed for wealth and riches, and much to her chagrin finds herself hopelessly in love with the Caped Crusader.
- Adaptational Villainy: In contemporary comics, Catwoman was an unrepentant thief and gang-boss but not especially violent or sadistic about it (on several occasions she even saved Batman's life). Here, she's a Deathtrap-happy arch-criminal with the occasional humanizing moment, as exemplified by one exchange from "Scat! Darn Catwoman":Batman: A wife no matter how beauteous, or affectionate would severely impair my crimefighting!
Catwoman: But I could help you in your work! As a former criminal, I'd be invaluable. I can reform, honestly I can!
Batman: What about Robin?
Catwoman: (Disgusted) ROBIN?! (Beat; gleefully) Oh, I've got it! We'll kill him!
Batman: ...I see you're not really ready to assume a life in society.
- Ascended Extra: Only one appearance in the first season, she was given significantly more stories in the follow-up seasons.
- Cats Have Nine Lives: She seemingly died twice, but always managed to comeback,
- Child Hater: On two separate occasions (three if you count Return of the Caped Crusaders), she casually proposes killing Robin after tying the knot with Batman.
- Classy Cat-Burglar: Sometimes (especially in her debut episode), but more often than not subverted, as this take on the character was a lot more thuggish and never really above straight-up extorting or mugging people.
- Death by Materialism: Famously in her first appearance, she refused to give up her loot and fell into a chasm inside a cave.
- Evil Is Sexy: In-Universe, even Batman admits it.Batman: Give credit where credit is due, Robin. She may be evil, but she is attractive. You'll know more about that in a couple of years.
- Greed: Her most defining trait.Catwoman: [after double-crossing her sole henchman after the Dynamic Duo arrested the others] There's never enough for two!
- Honey Trap: In the Movie, she successfully seduces Bruce Wayne in the guise of a Russian reporter, Kitka as part of the United Underworld's scheme to lure Batman into a trap by kidnapping Bruce Wayne.
- Iconic Outfit: Her Spy Catsuit, made of jet-black Sensual Spandex. This was actually the first take on the character to wear black, and like the Riddler example above, it was eventually ported into the comics (as well as Alternate Company Equivalent Black Cat).
- Never Going Back to Prison: She's demonstrated this attitude several times, which often leads to her leaping off tall ledges rather than give herself (and her current loot) up to the law. Good thing Batman and company never find the body and Cats Have Nine Lives...
- No Honor Among Thieves: In her partnership with Sandman she was fully intending to double-cross Sandman ... and was indignant when he beat her to it.
- Pungeon Master: Not quite as bad about it as Egghead, but she rarely passes up the chance to cram in a cat pun (or a "purr"). One episode had her running a nightclub where everything on the menu had "cat" somewhere in the name.
- Statuesque Stunner: Even without the heels, Newmar stood almost six feet; Yvonne Craig was reportedly terrified of facing her in a fight scene, and relieved to face the much-smaller Eartha Kitt.
- Sexy Cat Person: As in every version of Batcanon.
- Took a Level in Jerkass: Okay, she was never particularly good, but her feelings for Batman did a lot to humanize more than the other villains. But when Eartha Kitt was cast — the romantic angle between the two was dropped and Catwoman became more nasty to the heroes.
- Token Female: The only main female villain on the show.
- Villainesses Want Heroes: Not that she hasn't tried dating people on her own moral spectrum... it's just that for the most part they're all Gonks: she can't stand Joker's green hair, and Penguin's too... erm, small. Note also that unlike most versions of the character, she's perfectly fine with brainwashing or even killing Batman if she's not in a pining mood.
- Woman Of Wealth And Taste: Her lairs are always opulently decorated.
- Whip It Good: True to form, brandishes a cat o'nines as her usual weapon; its handle is also gimmicked to squirt Knockout Gas.
Dr. Schivel / Mr. Freeze
A Mad Scientist forced to live in a sub-zero temperatures after Batman accidentally spilled cryogenic chemicals on him. He appeared three times and was notably played by a different actor in each appearance.
- Adaptation Name Change: At the time, his comics counterpart (who had all of one story under his belt) was called Mr. Zero. The "Mr. Freeze" moniker stuck and was quickly back-ported to the comics.note
- Affably Evil: Sanders and Wallach; the Sanders even noted how he really didn't want to kill the Dynamic Duo, considering them fine people, but he felt he had no choice because he wanted revenge for the accident that made him the way is.
- Faux Affably Evil: The Preminger version has a thin veneer of politeness, but he's really nothing more than a cold, cruel bully.
- Bad Humor Truck: He's very fond of using ice-cream trucks (and factories) as bases of operation.
- Bald of Evil: Otto Preminger version only.
- Costume Evolution: The George Sanders version was a handsome middle-aged man force to wear a special suit. The subsequent incarnations looked inhuman with their ghastly blue skin and freeze collar making him look closer to modern incarnations of the character.
- Freudian Excuse: He was just a Mad Scientist, until Batman spilled those chemicals on him.
- Herr Doktor: Sanders and Wallach gave him a German accent. Preminger used his natural Austrian accent.
- Revenge: His primarily motivation for what Batman did to him — even if it was an accident."You must pay for what you did to me. For forcing me to live like this. Never again to know the warmth of a summer breeze. Never to feel the heat of burning logs in winter time. Revenge. That is what I need. Revenge! I will have revenge!
- Tragic Villain: Out of all the villains, it's hard to not to pity him considering he can't survive in normal temperatures without his special refrigerator suit or freeze collar. Even Batman pities him, and inpart believes himself responsible for Mr. Freeze's current state to a degree.
- Verbal Tic: The Preminger version, for reasons known only to him, often tacked "Wild!" in-between his sentences.
- Wicked Cultured: The George Sanders version enjoyed the finer things in life when in his lair he would lounge around in a fine dressing gown; he even timed how quickly it took his subzero skin to chill different liquors!
- Wolverine Publicity: In modern continuations and merchandising the Preminger version is the one that's used, possibly because he's the one more in tune with the how the character is modernly portrayed; ironic since Preminger was so rude and unprofessional that the production team brought in somebody else for Mr. Freeze's last appearance.
Jervis Tetch / The Mad Hatter
A particularly nasty thief obsessed with hats, who's dedicated his entire career to trying to add Batman's cowl to his collection.
- Alice Allusion: Averted. Tetch is obsessed with hats and just hats, per his characterization in the comics of the time.
- Ax-Crazy: As bad as Gotham's other arch-villains can be, not one of them looked forward to skinning people alive and making hats out of the resulting Genuine Human Hide.
- Collector of the Strange: Hats. It's a rather unhealthy obsession.
- The Determinator: He will do anything to get his hands on Batman's cowl — he even made it radioactive just to get Batman to take it off; ignoring the health risks of manhandling a radioactive cowl himself.
- Jerkass: The Mad Hatter is one of the meanest and humorless villains on the show.
- Nice Hat: A trick top hat with a pair of mechanical hypnotic eyes designed to knock victims out.
- Rage Against the Legal System: In his first appearance, he kidnapped the members of the jury that convicted him at his last trial.
- Sharp-Dressed Man: He always wears a very dapper gray morning suit to go with his top hat.
Prof. William McElroy / King Tut
A mild-mannered Egyptology professor who whenever he gets bumped on the head is convinced he's the reincarnation of King Tut and that Gotham is Thebes. The only villain outside of the main four to appear in all three seasons.
- Beware the Silly Ones: While he's one of the goofiest villains in terms of personality, he's also an utterly ruthless would-be tyrant (once torturing his moll into permanent insanity for daring to bring up his alter-ego), and in some respects actually came closest to unearthing Batman's secret identity.
- Evil Is Hammy: Tut has to be the most bombastic villain on the show.
- Jekyll & Hyde: Tut is only a villain when he gets bumped on the head. Another bump and he's back to his mild-mannered self.
- Nepharious Pharaoh: His main gimmick, though he mixes it with others as necessary.
- Split-Personality Takeover: His Season 3 appearances (perhaps inadvertently) hint at this - the justice system has apparently started treating him as a full-blown criminal, even locking him up in the Arch Criminal Wing alongside the likes of Joker and Penguin. The digital comic makes it even worse, confirming that Tut has, at the very least, learned how to masquerade as his civilian side.
- Awesomeness by Analysis: Out of all the villains, Egghead is the only one to realize that Batman would have to be a millionaire to fund his super heroics. After a simple process of elimination of Gotham's elite (one is too old, once has a French accent, one is left-handed, etc.) he concludes that Bruce Wayne is the only candidate.note Though for some reason, when the mind-reading machine he was going to use to check frizzes out, Egghead just drops the whole thing.
- Dirty Coward: This could apply to most if not all of the arch-criminals, but Egghead is the only one who flat-out admits it - to Batgirl, no less!
- My Brain Is Big: With a chrome-dome like that, what would you expect?
- Pungeon Master: Belts out a truly eggcessive number of egg puns whenever he gets the chance.
- Trademark Favorite Food: Taken Up to Eleven - according to Batman, his diet consists eggsclusively of grade triple-A white eggs.
- Unholy Matrimony: With Olga in the third season (though she's always quick to remind him he's only a prospective consort). This led to some serious Badass Decay for him, though he still had his moments.
Marsha, Queen of Diamonds
A world class-thief obsessed with diamonds, usually assisted by her Wicked Witch aunt Hilda.
- Deadpan Snarker: A lot more prone to this than the other villains, since his default mood is very laid-back and dry. That said, he also gets snarked a lot, thanks to his slow wit and temper flareups.
- Disco Dan: He's almost as over-the-top with his gimmick as Tut's, but he's sane enough to realize it's not 1866... he just really, really wishes it was.
- The Family That Slays Together: He and his fiancee Calamity Jan make a pretty faithful Outlaw Couple, and while Jan's mother Frontier Fanny nags him a lot, she is otherwise a fairly obedient and competent member of his gang.
- The Gunslinger: Keeping in with their Wild West theme, he and his gang are always armed to the teeth (not that it does them much good against the heroes' Plot Armor). He even keeps a Little Useless Gun in his hat as a last resort.
- Nobody Calls Me "Chicken"!: A rare villainous example - in his second appearance, this is how Batman draws him out of hiding.
- The Rustler: His debut episode played him as a modern-day version of this, an evil cowboy going around "rustling" cars and car parts.
Olga, Queen of the Cossacks
- Evil Redhead: Often obscured by her trademark fur hat, but it's definitely there.
- Funny Foreigner: Complete with over-the-top accentnote and cultural quirks that range from the funny ("Cossack queen is permitted up to six husbands!") to the horrifying ("wedding borscht made from captured prisoners!").
- Sensual Slavs: Played surprisingly straight, given the time period. What's more, she doesn't even pretend to have thoughts of a High-HeelFace Turn.
- Unholy Matrimony: With Egghead.
Louie the Lilac
- Escape Artist: Her biggest draw as a performer, though she's also capable of smaller magic tricks.
- Forced into Evil: While there were, perhaps, more ethical ways of solving her predicament, she's definitely not happy about her life of crime and draws the line at killing.
- Gender Flip: Her debut episode was loosely adapted from a comic ("Batman's Inescapable Doom Trap") that featured a male magician named Carnado the Great.
- High-HeelFace Turn: The only Special Guest Villain(ess) on the show who promised to reform at the end, and evidently meant it. Note that the digital comic completely ignores this.
A failed author turned super crook.
- Berserk Button: Don't bring up his failed attempts at literary greatness.
- Evil Brit: He is played by Roddy McDowall after all.
- Four Eyes, Zero Soul: Wears some of the biggest specs in the series, and is also one of the most violently unstable crooks.
- Hoist by His Own Petard: In the digital comic, he's eventually trapped in the same spellbook that he tried to use against Batgirl, who knew the incantations better than he did. Whether this was fatal or even permanent remains to be seen.
- Know-Nothing Know-It-All: He fancies himself quite the bibliophile, but naturally Batman (and Bruce Wayne) outclasses him.Bookworm: I'm so much cleverer than all of you, you see. Oh as the poet says "They who loose today may win tomorrow".Bruce Wayne: Wrong, Bookworm. Not the poet. That line's from Cervantes' Don Quixote. Part One: Book One: Chapter Seven.Bookworm: Poof! That devil. This fellow, he is almost as obnoxious as Batman.
- Nice Hat: It comes with its own reading lamp!
Rarely seen without his trusty mandolin, this deceptively foppish arch-villain knows everything there is to know about music - including the exact frequency needed to vibrate a city into dust.
Proud mother - and manager - of four infamous bank robbers, Ma Parker has terrorized countless cities across the nation, but finds Gotham and its own clan of crimefighters a decidedly tougher nut to crack.
- Evil Matriarch: Evil to the core, but loves her children to near-smothering levels... as long as they're following orders, that is.
- No Celebrities Were Harmed: A pretty blatant parody of Ma Barker, alleged ringmaster of the Barker Gang during The Great Depression. All of her children are likewise named after famous gangsters of the era: Pretty Boy, Machine Gun, Mad Dog, and - most interestingly - Legs.
The Clock King
- Clock King: Played with. He talks a big game about planning his crimes down to the second, but in practice he's just really fond of stealing (and wearing) timepieces.
- God-Created Canon Foreigner: His debut story was the last script penned by Bill Finger, in what was almost certainly the first time poor Finger received any official credit on a Batman story.
- Related in the Adaptation: The digital comic reveals he's actually Morris Tetch, the Mad Hatter's brother.
- Rogues-Gallery Transplant: A Green Arrow villain transferred to Batman's rogues.
A well-loved celebrity pianist, Chandell hides quite a few dark secrets - and a less-than-sterling conscience - behind his talented fingers.
- Even Evil Has Standards: Stealing plans for a prototype plane? Acceptable. Sealing it to a foreign government? Unthinkable!"Have you taken leave of your senses?! I may be an Arch Villain, but I'm a naturalized American Arch Villain".
- Suspiciously Similar Substitute: For the Riddler, due to Gorshin sitting out Season Two due to a contract dispute.
- Wicked Cultured: Had a propensity for dropping Shakespeare quotes, a nod to his actor's Classically-trained background.
A master thief from Europe, the Sandman is able to put just about anyone down for forty winks with one pinch of his chemically-treated sand - and in the process, turn them into sleepwalking Slave Mooks.
- Gold Digger: His Evil Plan was seducing noodle queen, Pauline J. Spaghetti posing as doctor to cure her of insomnia so he could get his hands on her vast fortune.
- No Honor Among Thieves: He teamed up with Catwoman but had no intention of sharing the loot with her; but on the flipside Catwoman was intending to do the same.
The crooked foreman of the Pink Chips Stamp Factory.
- Mundane Made Awesome: His entire Evil Plan revolves around the manufacture and circulation of ... counterfeit rare postage stamps. Yes really.
- Real Men Wear Pink: His work uniform because his employer, Pinky Pinkston is a girly-girl who demands it.
- Overshadowed by Awesome: Since his story was also the crossover with The Green Hornet. Gumm has the dubious distinction of being the only villain not to be given a "special guest villain credit".
- Trademark Favorite Food: Alphabet soup. He goes so far as to add extra letters."This alphabet soup needs more consonants in it."
Lorelei Circe / The Siren
- Evil Diva: Chanteuse by day, mind-controlling supervillainess by night.
- Squishy Wizard: The one genuine metahuman among Gotham's criminals, but absolutely useless in direct combat (so it's a good thing our heroes Wouldn't Hit a Girl...).
- Woman in White: Almost exclusively wears silver-white dresses; in her case, it's definitely a warning sign.
- Gold Digger: Her main - if not only - modus operandi as a solo crook. People getting wise to this was what forced her team up with Penguin.
- Old Friend: To Penguin, they were childhood playmates.
- Satellite Character: Penguin is pretty much the only character she ever interacts with; she doesn't even get to stick the Dynamic Duo in a deathtrap!
A pair of aristocratic siblings from across The Pond. Rather high-handed and snobbish on the surface, but deep down... they're much, much worse.
- Aristocrats Are Evil: Complete with their own Big Fancy House ("Ffogg Place"), cricket pavilion, and servants that double as Mooks.
- Evil Brit: And how!
- The Fagin: Apart from direct burglaries, they also run a "finishing school" teaching young girls how to steal and rob.
- Obfuscating Disability: In his "civilian" guise, Lord Ffogg usually keeps his leg in a cast, claiming to be suffering from gout.
- Siblings in Crime: Why they have different last names is never commented on.
- Smoke Out: Lord Ffogg's primary gimmick, produced by chemicals in his Distinguished Gentleman's Pipe.
- Villain with Good Publicity: Up until the Terrific Trio nabbed them, they were considered some of Her Majesty's noblest subjects, with reputations beyond reproach.
- Straw Feminist: Her main gimmick. Interestingly, despite the militancy of her demands she's a lot more level-headed (and good-looking) than you'd expect from a '60s take on this trope.
Dr. Cassandra Spellcraft & Cabala
An evil alchemist and her soppy husband.
- Alchemy Is Magic: Cassandra is an alchemist and her work blurs the two.
- Outlaw Couple: A somewhat bumpier one than Shame and Calamity Jan.
- Totally Radical: For some reason, their dialogue is peppered with Beatnik slang.
- Women Are Wiser: Villainous example - Dr. Spellcraft drives and plans all their schemes, while Cabala mostly stands around, takes orders, and makes wisecracks.
Continuation and Spin-Off Villains
- Canon Immigrant: They'll all prominent Batman rogues who were never in the original show because: a.) they simply didn't exist yet (Harley Quinn, Killer Croc, and Bane) or b.) they did exist but weren't used for a variety reasons (the Two-Face script was rejected for being too gruesome, Hugo Strange and Scacrecrow wouldn't become prominent until after the show ended, Poison Ivy was just created when the show was airing, etc).
- Knight of Cerebus: Given the nature of their characters, they are a lot darker than the majority of the rogues gallery.
- Adaptational Heroism: The DCAU and the comics have gone back and forth on it over the years, but most of them agree that pre-villain Harley wasn't an especially nice or moral person, and mostly went to Arkham hoping to cash in on the inmates' fame. This version seems genuinely dedicated to helping her charges, and only becomes evil after a Heroic Sacrifice to stop the Joker from driving the rest of Gotham insane.
- Punny Name: Somewhat downplayed. Her civilian name is much more mundane than the traditional "Harleen Quinzel", as is her villain handle.
- Rollerblade Good: Her villain costume is Roller Derby themed, much like the New 52 take at the time.
- Villainous Harlequin: Even after going evil, she's a lot softer and sweeter than your average supervillain.
Once Gotham's crusading District Attorney, Harvey Dent fell prey to his evil Split Personality when the left half of his face was horrifically disfigured. Now, he stalks the streets of Gotham as one of its most unpredictable - and deadly - villains, staking his every moral judgment on the flip of a coin.
Note that there are essentially two mutually exclusive versions of Harvey in the '66 continuity - one from the Lost Episode comicnote and one from the Batman vs. Two-Face animated film. While comparable in some respects, they have decidedly different origins and ultimate fates.
- Earn Your Happy Ending: The animated version is one of the only incarnations of Two-Face who is able to conquer his inner demons resume civilian life.
- Fallen Hero: One whose fall this particularly idealistic version of Batman never stops lamenting. In the animated film, said idealism is ultimately rewarded.
- Ink-Suit Actor: He is drawn to look like Shatner during his Captain Kirk days.
- Two-Faced: Well, duh. The digital comic opts for the classic acid-in-the-courtroom origin, while the animated movie goes the more fantastical route of him getting scarred by a machine that just extracted the evil from five of Gotham's worst supervillains.
Ruling a small Mexican village with an iron fist, the man known only as Bane has never been bested in combat, thanks to the strange green serum his most loyal lieutenants brew in the mysterious pyramids just outside his homeland. But eventually, inevitably, his ambitions turn to a certain city abroad... and to breaking its precious protector.
Prof. Jonathan Crane / The Scarecrow
Waylon Jones / Killer Croc
Prof. Hugo Strange
An unassuming, learned gentleman that runs the Arkham Institute, devoting himself to containing and reforming Gotham's countless arch-villains. Or so he'd have you think.
In truth, the man who styles himself "Professor Hugo" is one of Europe's most wanted criminal masterminds, who seeks nothing less than world domination. To this end, he's allied himself with several of the aforementioned arch-villains and an international terrorist syndicate... but still, he hungers for more...
- Death by Secret Identity: A non-fatal variant. Not long after discovering Batman's secret identity, he's left an insane, babbling wreck who thinks he's Batman.