
A mysterious person calling himself "the Joker" announces on the radio that he will kill Henry Claridge and steal the Claridge diamond at midnight. A cordon of cops guard Claridge's home, but he dies anyway, at midnight with a grotesque smile on his face. (He's been dosed, much earlier, with a delayed-action treatment of Joker Venom.) The police then discover that the diamond was already stolen, and that it was replaced with a glass one, and the perpetrator has left behind his calling card, a Joker....
Later the Joker goes on radio and announces that he will kill Jay Wilde and steal the Ronkers Ruby. Once again a cordon of police fails to safeguard the victim, who is killed at exactly midnight, with a poison dart, by the Joker, hiding in a suit of armor. The Joker deploys a paralyzing gas against the police, and departs with his loot.
But a mobster named Brute Nelson, who is enraged that the Joker is pulling off all these jobs that he had planned to do, sends word out that he thinks that the Joker is a coward. Bruce Wayne and Dick Grayson hear about this and suspect a trap. Batman goes to the mobster's house. The Joker is also there, and he shoots and kills Nelson, but he is pursued by Batman. However, the Joker gets the upper hand by knocking Batman off a bridge.
Luckily Batman survives. The Joker then resumes his work by announcing that he will kill Judge Drake. The Joker impersonates the police chief, and kills the judge with Joker Venom, and leaves. Robin has been stationed outside, to follow whoever comes out, and he trails the killer to an abandoned house, where the Joker turns the tables on him and captures Robin.
The soles of Robin's shoes have been painted with an special chemical, and Batman used infra-red goggles to follow his trail, arriving just in time to save him from an injection of Joker Venom, and there's a big fight. The Joker sprays Batman with the same paralyzing gas that had taken out a whole squad of cops, but Batman just shakes it off, grabs Robin, and escapes. The Joker also manages to escape. Robin then tells Batman that the Joker was saying that he was going after the Cleopatra Necklace, owned by Otto Drexel. Batman and Robin arrive while the robbery is still in progress; the Joker uses all his ammunition shooting Batman in the chest; Batman has on a bullet-proof vest; Joker loses and is sent to the State Penitentiary.
Tropes pertaining to The Joker
- Crazy-Prepared: The Joker reveals that he planned his murders and robberies in advance; he infects his sleeping victims with deadly gas the previous night which kills its victims a day after, giving the Joker time to steal their valuables and replace them with phonies and watch as the millionaires he's duped are killed at the expected time, their faces malforming into a disturbing grin.
- Establishing Character Moment: The debuting Joker makes his presence felt immediately; in the first page of the comic, the Joker holds up a trio of cards, two of which feature Batman and Robin, and turns to the reader and reveals a Slasher Smile; that same, terrifying grin that continues to haunt comic book readers to this day.
- His first murder can also be this, establishing that while the Joker looks like a silly clown, he is not someone to be taken lightly!

While an innocent metropolis sleeps, little does it realize that huge, terrifying man- monsters shall soon stalk the streets and bring to them havoc and destruction and little does Bruce Wayne suspect that fate shall touch his shoulder and single him out as the one to do battle with these monsters, as he goes forth clad in the garb of the weird and menacing... Batman!
Tropes pertaining to The Giants of Hugo Strange
- Absentee Actor: The only story out of the four not to feature Robin. Ironic, considering that this story was originally intended for Detective Comics Number 38.

Denny throws a piece of paper over the side of the yacht, but the wind blows it back to Dick. The letter is from The Cat, asking Denny to keep Mrs. Travers away from her room. Suspecting the theft is about to take place, Dick hurries to the cabin, but Mrs. Travers has already discovered the theft. A boat claiming to be the Coast Guard approaches, but it is actually full of mobsters, after the necklace. The mobsters content themselves with stealing everything else, but when they go to shoot someone for protecting his wife, Dick barrels into them and gets knocked into the sea. He takes this chance to turn into Robin.
Meanwhile, the mobsters leave, satisfied with their takings. They race away, but Batman appears and knocks them around. Robin has surfaced and joins in, with an object lesson. consisting of him versus four unarmed mobsters. The crooks quit (to stop Robin from hitting them any more), and Batman proves that, without their guns, crooks are cowards through and through.
They return to the yacht and Batman crashes a fancy dress party, to be awarded with the first prize. He returns the stolen loot and Robin sets off the fire alarm. This is a trap to persuade the Cat to reveal him/herself. Mrs. Peggs races off surprisingly well for someone with a bad ankle, but the Dynamic Duo still catch her. Batman pulls off her wig and removes her make-up to reveal a pretty girl. The necklace is hidden under her bandage. Denny tries to take the necklace, but Batman knocks him out. The Cat tries to persuade Batman to join her as King of Crime, but he refuses.
Then, despite leaving Denny on the yacht, Batman takes the Cat to the police himself. However, the Cat jumps over the side and Batman lets her escape. He's clearly smitten.
Tropes pertaining to The Cat
- Early Installment Weirdness: Catwoman isn't wearing her signature catsuit in her debut.

The next day, a painting is stolen, and the owner of a stolen gem is found dead, grinning. Then the Joker threatens to steal the Cleopatra necklace. Bruce Wayne, hearing it on the radio, promises to stop him. That night, in the museum, the Joker emerges from a sarcophagus, and uses his poison to incapacitate the guards. Batman appears and disarms him. The Joker seizes an axe and knocks out Batman. The Police arrive, and find the unconscious Batman AND the missing necklace. Before the cops can remove Batman's cowl, he snaps awake and escapes out the window.
A reformer, Edgar Martin calls for the capture of the Joker, and is marked for death. That night, Martin is under guard and plays cards to calm down. But the pack is all jokers, and poison-laced, killing Martin.
The next day Bruce Wayne suggests a trap for the Joker to his friend Commissioner Gordon. The press prints a series of articles on the Fire Ruby, and despite suspecting a trap, the Joker goes for it. When he arrives, the police surround him, and he shoots, making for the roof. Robin, waiting for him, follows. Joker knocks him off the roof, but Robin grabs a flagpole to save himself. Running down to see if Robin has died, the Joker takes aim and is intercepted by Batman. Robin falls down and lands on the Joker. Batman and Joker fight, and Joker stabs himself in the chest. Batman and Robin flee, leaving the Police to find out that the Joker is still alive.
Tropes pertaining to The Joker Returns
- Immediate Sequel: The story take places merely two days after the first Joker story.