The 28 hidden characters in Batman: Arkham Asylum

First comic appearance: Detective Comics #74 (April 1943)

Arkham Asylum appearance: Arkham North (Entrance Gate)

The connection: Two more characters who steal their persona from nursery rhymes and Lewis Carroll books… what are the odds? Pretty high in Gotham City, we suspect. While the pair are not considered particularly insane, they do appear in the aforementioned Arkham Asylum: A Serious House on Serious Earth. In that graphic novel, they are connected by a couple of electroshock helmets, with one as the left half of the brain and the other as the right half.

So are the beanies sitting on this seesaw equally complicated? Or are they simple, silly costume hats? We may never find out.

BizarroFun Fact: In the comics, the original Tweedledum has died and been replaced by his twin brother. Both are cousins to Tweedledee.

Charlie Barratt
I enjoy sunshine, the company of kittens and turning frowns upside down. I am also a fan of sarcasm. Let's be friends!
Latest in Action
Death Stranding 2: On the Beach
Dark Souls 2 fans remind Death Stranding 2 director Hideo Kojima that he won’t be taking the DS2 acronym that easily
Death Stranding 2
Hideo Kojima says Death Stranding's themes of connection came about because "I thought I lost everything when I became alone nine years ago"
Beyond the Ice Palace 2
After 37 years, this Commodore 64 classic returns with a new Metroidvania sequel that gives serious old-school Castlevania vibes
Fortnite's Lara croft skin in front of a building
Fortnite has had Tomb Raider's Lara Croft locked away in battle pass exclusivity jail for almost 4 years, but she's reportedly getting a new skin very soon
The Last of Us 2
The Last of Us creator Neil Druckmann sounds like he's contemplating the end of his career: "When is it time to stop?"
Screenshot of Neil in Death Stranding 2
Hideo Kojima says he chose Death Stranding 2's Solid Snake lookalike because he needed an actor who "would surpass" Mads Mikkelsen
Latest in Features
The Witcher 3 screenshot of Geralt
Avowed and Kingdom Come: Deliverance 2 tap into the same thing that makes The Witcher 3 so compelling – and it's something I'm always looking for in RPGs
Marvel Rivals Spider-Man
Spider-Man has become every Marvel Rivals player's worst nightmare
The Punisher holding two machine guns in the rain
Daredevil: Born Again - Learn the bullet-riddled comic book history of the Punisher before he officially joins the MCU
A woman in a underwater machine waving during the cinematic teaser for Subnautica 2.
Subnautica 2: Everything we know about the new underwater survival game
The AMD Ryzen 7 8700G being held above a motherboard by a reviewer
AMD's pro-consumer 9070 strategies are exactly why it's primed to dominate the CPU market in 2025
Assassin's Creed Shadows cinematic screenshot
Assassin's Creed Shadows' transmog looks set to combine the best of Odyssey and Vahalla to make changing my drip easier than ever