Location: LA Memorial Hospital

Hotch and JJ entered the hospital and made their way to a room where Rossi was waiting for them. They peeked inside the room and saw the roller rink victim lying on a bed with both sides of her lips stitched up and her left hand wrapped in gauze.

"Her name is Rebecca Green," said Rossi. "She was found tied up at the local roller rink with her ring finger cut off."

The three then entered the room.

"Rebecca, we're with the FBI," said Hotch. "We need you to tell us what happened so we can find the person who did this to you."

Rebecca was silent for a few seconds before she took a deep breath and started to talk.

"I was in my apartment with my boyfriend..'

Flashback

Rebecca was sitting on a couch in her apartment with her boyfriend, Gary. Both of them were drinking a glass of whine. Gary then smiled, leaned forward and was about to kiss Rebecca when suddenly there was a knock at the door.

"Who could that be?" asked Rebecca as she got up to answer, but then Gary stopped her.

"I'll get it," he said as he got up and walked towards the door.

When he opened it, a young man, who had to be in his early 20s, wearing a straw sun hat and Hawaiian shirt, greeted him. But what really caught Gary's attention was the man's face, which was covered in white make up with red make up around his lips.

Before Gary could say anything, the man pulled out a small handgun and shot him in both of his kneecaps. Gary fell to the ground, screaming in pain as Rebecca looked at the whole thing in shock. The man noticed her and a sinister looking smile appeared on his face.

"Well hello, beautiful," he said as he walked towards her.

Rebecca jumped off her couch and ran towards the door, but the man quickly grabbed her and jabbed a syringe into her neck, injecting her with a white serum. Rebecca soon began to feel light headed. She staggered around a bit before she fell to the ground and passed out.

Present Time…

"When I came to, I was tied up in the roller rink and felt this sharp pain in my hand," Rebecca said as she finished telling her story to the agents. "A man found me and called an ambulance."

JJ, Hotch and Rossi stared at each other and tried to make sense of what they just heard. Judging by the scars on Rebecca's face, they were dealing with the same UnSub, but why did he let her live while he murdered his other victims?

Back at the police station, Morgan had brought in the video that was playing at the theatre and was busy watching it, trying to figure out what it meant. At that moment, Reid had entered the room and saw Morgan watching the video. Something soon clicked into his mind as he saw the hooded figure say, "If you gotta go, go with a smile."

"I knew it," Reid shouted, startling Morgan.

"Geez Reid, don't scare me like that," Morgan said. "What do mean you knew?"

"No time to explain," said Reid as he was leaving the room. "Call up the others and tell them to meet me in the break room."

A few minutes later, Hotch, Morgan, JJ and Rossi were all sitting around a table in the break room, curious at what Reid was going to show them. Reid then entered the room, holding onto the large black box he had with him on the plane.

"I think I know the UnSub's motive," Reid said as he placed the box onto the table.

The others looked at the box and saw the words BAT BOX written on top of the lid. Reid then removed it the others saw what was inside. There were a number of comic books and DVDs all stacked in a row and on top of them was a rubber Batman mask.

"This was from an old Halloween costume," Reid said as he took out the mask and placed it on the table. He then tipped the box over the box and dumped all of the comics and DVDs onto the table.

"This is my personal Batman collection," he said. "I've started collecting these ever since I was a kid. I was a huge Batman fan and I think so is our UnSub."

"So you mean to say that our UnSub is basing his killings off of Batman stories," asked Morgan.

"Not just any Batman stories," said Reid. " But ones about the most popular and notorious villain of all time."

Reid then picked up one of his comics and showed it everyone. On the cover, was a creepy looking clown with green hair holding onto a smiling gold fish.

"I'm of course referring to the Joker," said Reid.

"Are you sure about this?" asked JJ.

"Pretty sure," said Reid. "When I saw the two first victims that Garcia showed us, I thought they looked familiar. But when I saw the video that Morgan got from the theatre crime scene, I knew that it was no coincidence. Each of these crimes is based off of an event that was related to the Joker."

Reid then rummaged through his collection until he found the comic he was looking for. He picked it up and showed it everyone before talking again.

"In this issue, Detective Comics #741, the Joker murders Commissioner Gordon's wife by shooting her in the head and leaving her body surrounded by the hundreds of babies that he had kidnapped."

Reid then flipped through the pages of the comics until he found the page he was looking for and showed it. It was a large panel of the Joker leaving a room where a bunch of babies were crawling over the dead body of a woman with a gunshot wound to the head.

"Karen Oliver died in the maternity ward in the hospital," Hotch realized. "It is full of babies."

Reid then picked up another comic and showed before talking again.

"In the Batgirl issue of Death of the Family, the Joker kidnaps the mother of Barbra Gordon, aka Batgirl, ties her up in a roller rink and cuts off her ring finger and gives it Batgirl as part of a sick wedding proposal. Which is exactly what happened to Rebecca Green."

Reid then showed another comic. On the cover was the Joker with a camera.

"In The Killing Joke, the Joker entered Barbra Gordon's apartment and shot her in the spine in the exact same way Rebecca described what happened to her boyfriend."

Reid put the comic down and picked up a DVD. On it was a huge Batman symbol.

"It is not just comics," he said. "I also believe that our UnSub is basing his crimes on the movies as well. In the live action Batman film from 1989, the Joker puts on a big parade in downtown Gotham and gives out free money before trying to kill everyone with a poisonous gas that was leaked out of his parade balloons. The words the UnSub said in the video at the theatre scene are the exact same words the Joker said before unleashing the gas."

"It was the perfect re-enactment," said Rossi. "The fake money on the ground, the video, the room filling up with mustard gas. This guy got it down to the very last detail."

Reid then picked up another DVD and placed it inside the DVD player in the room. He then grabbed the remote and went to the scene selection and searched until he found the scene he was looking for.

"This is the animated film, The Dark Knight Returns," he said. "Which is based off of the Frank Miller comic of the same name. In this once scene, the Joker tricks his therapist into letting him go on a talk show to prove that he has reformed. "

Reid hit PLAY on the remote and showed everyone the scene. It showed the Joker on a talk show, sitting between his therapist and the host, while sipping from a coffee mug. As the therapist was explaining that Batman was the "real sicko" the Joker lifted up his mug and asked the host "Do guests get to keep these?"

"Sure, you do whatever you want with it," the host chuckled. "We got a closet full of them."

The Joker then smashed the mug against the host's desk and used it to slash the therapist's throat. The therapist then collapsed onto the desk as the Joker just smiled and shrugged at the host before saying, "So long as you won't miss it."

"That's what was written on the note that was found next to Thomas Thurston's body," said Rossi.

As the team gathered up this information, there was only one thing for Hotch.

"Time to do the profile."