Catwoman swiped her claws at Barbara. Then she ran out of the door and quickly headed down the hallway. Before the teens could reach her, the villain slipped inside the thirteenth door.

“Where does this lead?” asked Tim. He opened the thirteenth door and looked up a tall flight of stairs.

“To the roof,” Jason replied. “My dad sometimes writes his books up there when the weather is nice.”

The trio raced up the stairs. When they reached the top, Tim was the first one outside, and he quickly spotted Catwoman at the edge of the roof. She was gripping a ladder that led to a dark helicopter overhead.

Tim wasted no time. With a flick of his wrist, he threw a Batarang at the escaping villain. Its edge sliced through the ladder’s cables. Catwoman’s means of escape collapsed in a pile at her feet.

“That’s some costume!” Jason exclaimed. “You’d think Tim was the real Robin.”

As the helicopter flew off, Catwoman quickly came after Tim. The angry feline slashed at him with her razor-sharp claws.

When Barbara went to help, Jason jumped in front of her. “I’ll handle this,” he said, striding toward the super-villain.

“If you’re trying to be a hero,” shouted Catwoman, “you’re a little underdressed.”

“I may not have a silly costume, but I won’t let you steal from my dad,” said Jason. “Give me the Black Cat Diamond!”

Barbara knew Jason was out of his league. Catwoman would have him for dinner. She watched as Jason made a fist. “Give me the diamond,” he said again, “or I’ll knock your block off!”

“Try it,” Catwoman said.

Jason gritted his teeth. He wound up and threw his best punch.

Before his fist could connect, Barbara quickly took action. She grabbed a Batarang from her Utility Belt, aimed, and flung the weapon at her foe. Catwoman and Jason were so focused on each other that neither of them noticed the Batarang flying their way.

The weapon struck Catwoman and knocked her to the ground.

Jason’s fist met empty air. He spun around, off balance, and fell on top of the downed Catwoman.

“You did it, Jason!” Barbara said. She ran toward the teenager’s side. “Good job.”

“Oh, brother,” Tim exclaimed.

By the time they brought Catwoman downstairs, the police had arrived. The officers put the Black Cat Diamond into a plastic bag for evidence.

“Take care of that,” Mr. Graves said to the officers. “I almost lost a fortune to that crazy woman!”

“Crazy!” yelled Catwoman. “I was going sell the diamond and give the profits to the city’s pet shelters. You’re a millionaire, but you want to sell the Cat for money. That’s what I call crazy!”

Catwoman hissed and continued, “It was a perfect plan. I would have gotten away with it, if it wasn’t for those super hero wannabes.”

“And thanks to them,” said the police officer, “you’ll be going back to jail for a long time. But first,” he added, “Batman wanted us to double-check something.”

The police officer grabbed the villain’s mask and yanked it off her head. “Selina Kyle,” he said, confirming the identity of the real Catwoman. The officer turned to the teens. “You can never be too sure who’s behind the mask on Halloween.”

“That’s what I love about this night,” said Stephen Graves. “On Halloween, you can pretend to be whoever you want.”

“We should help the cops,” said Barbara.

“Yeah,” Tim said. “Let’s lend a hand.”

“Thanks again, kids,” said Mr. Graves. “The real Batgirl and Robin couldn’t have handled it any better.”

Barbara and Tim each gave a little smile. Then they dusted off their uniforms and started to say their good-byes.

“By the way, those costumes are just like the real thing,” Mr. Graves said. “I need to have them for my collection. Where did you get them?”

“Dad,” Jason said with a groan. “No more collectables. Please.”

* * *

On the roof of a nearby house, the Dark Knight crouched in the shadows. His black cape flapped in the cool breeze.

Batman had arrived in time to see Batgirl and Robin defeat Catwoman on the roof of the Graves Mansion. The teens had managed to capture the feline felon without revealing their own secret identities.

Quite a trick, Batman thought. Though Batgirl and Robin were still young, they had become full-fledged heroes.