I don't own Harry Potter or Code Lyoko

Killer Music

Ulrich was at his desk, studying.

"Oh, oh, oh, oh! Oh, I'm glad when you're so bad! Uh, uh, OH, OHH!" sang Odd.

"Hey, Odd! If you don't mind, I'm…trying to study!" said Ulrich.

"Mm mm mmm mm…YEEEEEEEEEAHHHH!" continued Odd, not hearing Ulrich.

"Cut that out! Maybe you forgot, but we've got a test tomorrow! …SO STOP!" yelled Ulrich.

"Huh? What'd you say? I can't hear a thing!" asked Odd.

"I said I want to study, ODD!" Ulrich Yelled again.

"What's the sense of you studying? Whatever you do, you're still going to get a low mark in physics! So why not listen to what I downloaded from the web? Go on, listen to it! It sure beats studying! It's like pure music! And nobody knows who wrote it either! It's an MP3 file, and it's free! It's a pop rock revolution!" said Odd. "And if you continue shouting, Jim will come."

"You want a revolution? Ok, I'll give you one! You don't think of anyone but yourself. I'm fed up! And if you don't know who the file is from, don't download it!" said Ulrich angrily as he headed out the door.

"Hey, where you going?" asked Odd.

"To Jeremy's room! At least he knows you need peace and quiet when you're studying! He's not like you, selfish!" yelled Ulrich as he slammed the door.

"Don't worry, Kiwi, he'll get over it!" said Odd. He laid down on his bed and sang "I'm so glad when you're bad!"

He stood back up and started swinging Kiwi around, still singing, before collapsing on his bed. Kiwi scratched his face and started whimpering.

Harry's and Jeremy's dorm

Jeremy was fiddling with his robot and Harry was working on the materialisation program. There was a knock on the door.

"Ulrich? What's the matter?" asked Jeremy as he opened the door and walked out.

"Odd and his music are driving me nuts!" exclaimed Ulrich.

"You're not into heavy metal, pop, funk?" asked Jeremy.

"Not when I have to study for an exam! Is it ok if I study in your room?"

"Sure. I could even give you some help if you wanted."

"I could sure use some."

The next day

"Time to get up Ulrich." Jeremy shook his shoulder.

"Too tired."

"I don't need to remind you that you have an exam today."

"I didn't get a lot of sleep," Said Ulrich.

"Really? How come?" asked Jeremy.

"Hmph…well I'll tell you how come! Oh, Aelita! Oh, Aelita you're in my dreams! I can't wait until…" said Ulrich in a lovely-dovey voice.

"Shhhh! She'll hear you!" said Jeremy as he covered Ulrich's mouth and glanced at the computer. "I get enough of that from Harry."

"Between you and Odd, I can't study or sleep!" exclaimed Ulrich.

"Hey, you're not going to tell anybody, huh?" asked Jeremy as he blushed.

"Promise, Romeo! Let's go get breakfast. Where is that brother of mine anyway?"

"He went to breakfast already."

Lyoko

Aelita was doing research on earth in a tower.

Lunch room

"Have you finished the layout?" asked Milly.

"Yeah, sure," replied Tamiya.

"How come Odd's not here?" asked Jeremy.

"I couldn't care less," said Ulrich.

Harry rubbed his head. "Hey Ulrich, what song was Ulrich listening to last night?"

"Some song called Glad to be bad. He downloaded it from the web sometime. Why?"

"We have a serious problem on our hands. I'm going to check on him." Harry ran off.

"What's this song's name?" asked Nicholas.

"It's called glad to be bad," said Sissi. "I honestly can't believe how unhip you guys are! You're a couple of real losers! You ought to go out once in a while!"

"Well then fill us in, Sissi! What kind of music is it? Is it R&B?" asked Nicholas.

"R&B?! While not waltz music while you're at it?!"

"Odd ought to be here by now. Maybe he didn't wake up."

"Forget about it. It's his problem," said Ulrich.

"We can't let him miss his exam!" said Jeremy.

"Yes we can!" said Ulrich as he went to tidy up.

The bell rang.

Outside

"Odd and Harry aren't here. Where are they?" asked Yumi as she walked up to them.

"Odd's in his dorm and Harry's gone to get him. I'm beginning to worry though. I'm going to check on them. You coming Ulrich?"

"We'll miss part of the exam if we go."

"Not if we hurry."

"Keep me posted," said Yumi as the boys walked off.

Odd's and Ulrich's dorm

"He sang that same song over and over!" said Ulrich as they opened the door. "And look, now he's fast asleep!"

"Hey Odd, get up, will you?" said Jeremy as he shock Odd's shoulders.

"If this is a joke, it's a bad one!" exclaimed Ulrich. "We're going to be late."

"It's more serious than that," said Harry. "It's Xana."

"Harry, you know Xana can't affect us directly," said Jeremy.

"Ulrich, where did he get the song? And who's the artist?" asked Harry.

"He downloaded it. I told you that. It's from an unknown artist… oh no! You don't think the artist is Xana, do you?" asked Ulrich.

"That's exactly what I think," said Harry. "He used the music as a medium to affect us. It's probably what left Odd in this state. Help me get him to the infirmary."

Infirmary

"Odd? Odd, can you hear me?" asked Yolanda. Delmas came in. "Call the hospital and tell them it's very, very urgent."

Delmas walked out to do just that.

"His heartbeat and blood pressure is very low. I don't understand."

Harry, Ulrich and Jeremy looked at each other.

Class

"If we add up the resistances in a continuous circuit, the intensity of the current diminishes. In a divertive circuit however, the current produced by the generator is equal to the sum of the intensities in the branches," said Ms Hertz as Yumi's phone vibrated. She read the text. 'Odd.'

"It uses the following equation y equals…"

"Sorry Ms Hertz but I have to go. It's Odd…" said Yumi as she walked out the door.

"Yumi!"

The class started talking to each other.

"Alright, settle down."

Outside

Odd was lifted into the ambulance on a stretcher. Yumi ran up to the three boys watching.

"What's the matter? Is it's serious?" she asked.

"Yes, it's serious," said Harry. "His heartbeat and blood pressure are low and he's in a coma."

"Xana?"

"Xana's not capable of attacking us directly," said Jeremy. "As I told Harry."

"If only I had stayed with him last night." said Ulrich. "It wouldn't have happened. We had a fight and I slept in Jeremy's room."

"How could you have known?" asked Yum as she hugged him.

"Yumi's, right," said Harry. "I'm the one who's slightly psychic but that's only when it concerns Xana and I only get it a while before the attack at best. The best I could have told you was that Xana was attacking and the attack involved Xana using music."

"I'm staying with him!" said Ulrich to the ambulance driver as he ran over.

"I'm sorry, Ulrich, but I can't permit you to leave the school grounds," said Delmas. "Harry, help me. You're the voice of reason between the two of you."

"Sorry but I don't think there's anything we can do," said Harry as he watched Ulrich. "He blames himself and Odd is his best friend. It would be problematic to stop him and he might go later when someone's not watching."

"I'm staying with Odd!" said Ulrich as he climbed onto the ambulance.

"Ulrich, get away from that ambulance! That is not the right way to help him!"

"I don't care. I can't let him be taken away like this."

"Alright, you can go."

"Talking about the right way to help, I'm going to Lyoko," said Harry.

"Why?" asked Jeremy.

"I'm sure this is Xana," said Harry. "My Xana senses are tingling."

"Spider man again?"

"What?"

"Weren't you listening? Xana can't affect us directly."

"He can affect us indirectly. Odd was listening to a new song he downloaded," said Harry. "And we don't know who the artist was. It could be possible that the artist was Xana so we should keep an eye out. I'm going to the factory now."

He ran off.

"I'm going too," said Jeremy.

"What if there's a Xana attack?" asked Yumi.

"Harry can keep an eye out," said Jeremy. "We can stay in contact."

He jumped in, the doors were closed and the ambulance drove off. A cloud covered the sunlight.

Hospital

"We can't handle many more patients," said a nurse.

"Ulrich, you're not to blame," said Jeremy.

"No, it's my fault," said Ulrich.

"No, it's not. You couldn't have changed anything even if you had been there," said Jeremy. "You really need to get out of this funk. I'm going to get us a soda." Jeremy walked off.

"I'm going to see Odd. I'll see you in his room"

There were various messages over the intercom as Jeremy opened a door and slipped inside the room. He pulled out his laptop.

"Aelita? Aelita?"

"Oh, hello Jeremy. How's everything going?" asked Aelita.

"Not very well. Odd is in a coma with low blood pressure and heart beat and more cases are coming in. Is Harry there? The last time I saw him, he was heading for the lab."

"He's checking the list of coma patients against the list of people who have heard a certain song. He's also running a scan. I'm keeping an eye out for Xana. Is it possible for Xana to find a way to attack you directly?"

"I don't know. Tell Harry to hurry up and get to Lyoko. I'll warn Ulrich and Yumi."

"Ok."

Lyoko

"What did Jeremy want?" asked Harry.

"He was checking up on us. He wanted me to tell you to hurry up and get over here," Aelita said as she jumped off the edge of the platform. "He's warning Yumi and Ulrich. Odd's getting weaker and weaker. I'm in the mountain sector."

Kadic

Yumi picked up the call as Sissi walked by with music playing. She ended the call. "Sissi? Are you ok?"

Sissi collapsed. "Sissi!" Yumi walked up. "Hey, Sissi! Oh no!"

She pulled off her headphones and listen to the music. She started to get dizzy.

"Harry was right."

Hospital

"I just talked to Aelita. She's seeing if Xana is the cause of our problems," said Jeremy as he put his hand on his shoulder. "I know that going to Lyoko is the only way to save him. Let's get to the factory."

"We'll get you out of this. I swear we will," Ulrich said to Odd as he walked out.

Lyoko

"Harry, I'm sensing pulsations in the mountain sector," said Aelita.

"Alright. Stay where you are. I'll come over," said Harry.

He set up the delayed virtualisation program and went to the scanners.

"Hey Aelita! Get down from there!" he called. Aelita jumped down from the massive rock she was sitting on.

Jeremy

Jeremy and Ulrich were running down a street when Jeremy's phone rang.

"Hey, Jeremy, how's Odd?" asked Yumi as she dragged Sissi to the infirmary.

"He's getting weaker and weaker."

"Sissi's got the same symptoms," said Yumi. "I think Harry's right when he said it was the music."

"It could be an epidemic started by Xana. Get over to the factory."

Infirmary

There was a knock on the door.

"Oh no. Sissi! This way."

Yumi placed Sissi on the bed. The radio started to play the song.

"I hate that song," said Yumi as she started to sway and covered her ears.

Lab

"We're in the lab," said Jeremy as he sat down and glanced at Harry's laptop. "Harry with you?"

"Of course I am," said Harry. "Do you think I'm about to let one of my friends die?"

"Xana's pulsations are getting stronger. The tower can't be too far away."

"Any monsters?"

"Not yet. Speak of the devil. There's a swarm of monsters."

Harry ran towards the monsters and destroyed them in under a minute.

"Super speed. Got to love it."

"And at first, you didn't like them," muttered Ulrich.

"Ulrich's coming soon. Stay where you are," ordered Jeremy.

"Jeremy, if we wait, Odd might not survive," said Harry. "We need to deactivate the tower now!"

"He's going to last for a while yet Harry. Hello Yumi."

"Harry was right," said Yumi. "It was the song."

"The song?" asked Jeremy. "I don't understand."

"The song glad when you're bad. That's the one causing it. Xana formatted it and now he's spreading it."

"That's the one Odd was listening to," said Ulrich.

"Xana's using the media for maximum coverage," said Jeremy.

"Talk about killer music," said Harry. "I was right. As always."

"Yeah yeah. You're always right. Stop rubbing it in Harry."

"We'd better deactivate the tower," said Ulrich as he headed for the scanners. "Send Yumi as soon as she gets here."

"Ok. I'll put you down next to Harry and Aelita. Transfer Ulrich. Scanner Ulrich. Virtualisation!"

Lyoko

"Ok you two. Let's get to that tower," said Ulrich.

"Right. This way." They started to run.

Hospital

Odd's heartbeat started to get even weaker as he lay on the bed.

Lyoko

"Ok. We're at the tower." Aelita started to walk forward but Harry stopped her.

"Don't you think this is too easy?" he asked. "I know Xana sent that large swarm but…"

Jeremy put the news on.

"We have been receiving calls warning of an epidemic with no known cause. Let's go to our reporter on the scene."

"Thank you. As soon as news of the first cases were announced, I was on the scene. Things are dramatic to say the least. The authorities can't put a number on the people who have been affected by the disease whose origins are unknown and whose outcomes could be fatal. Health officials are on the scene."

"Ah, there they are," said Harry as he pointed at a Blok. Ulrich destroyed it but was frozen for three minutes. Harry sighed then groaned as he dodged the shot aimed at him then stabbed it with a sword.

"That's kinda relaxing."

"Hey Jeremy," said Yumi as she walked in. "Everything alright on Lyoko?"

"Not really. Harry is fighting Krabes… make that fought Krabes and Ulrich is frozen solid for the time being."

"I'm ready to go." Yumi ran to the scanners.

"To the mountains. Transfer Yumi. Scanner Yumi. Virtualisation! Thirty seconds to go Ulrich."

"Why don't I just go ahead to the tower and deactivate it?" suggested Harry. "Yumi's here and Aelita does have a weapon now so we don't need to keep a close eye on her."

"You'll never make it all alone Harry!"

"Who said that Harry would be alone?" asked Ulrich. "And you know he can out run any monster."

He destroyed a Blok.

"And Xana needs to create more powerful monsters."

"Don't give him ideas," said Jeremy. "For all we know, he might just do that."

"That's an idea! Create monsters for our side!"

"The first cases were discovered at Kadic Junior High School," said the reporter as the image was replaced by the eye of Xana.

"Huh? You guys, hurry up! Xana's trying to get at me now!"

Jeremy pulled out the wire for the speakers but Xana turned them back on.

"Oh no!" Jeremy put his hands over his ears but he collapsed.

"Jeremy!"

Harry and Aelita looked at one another.

"We need to deactivate the tower," said Harry.

"You go. You're faster."

"Right." Harry zoomed off as Ulrich got devirtualised by another Blok.

"What? Oh no!" Ulrich put his hands over his ears and started to walk other to the doors but he was straining to even move his finger.

Harry

"What the…" the platforms to the tower were moving. Harry sighed and started to jump over the gaps to the tower.

"Finally. That was some trap. Oh. Look. Yumi and Aelita."

He entered the tower and pressed his pal to the screen.

Harry

Code

Lyoko

Hospital

Odd's heart stopped.

Lab

Jeremy crawled over to the chair.

"Set the coordinates for the return to the past… set it to run when the tower deactivates… I did it."

Jeremy slumped in his chair.

The white light engulfed the planet and sent back the memories of five people as well as healing everyone affected.

Earlier

Odd was listening to music and singing again.

"Come on Odd. I'm trying to study," said Ulrich.

"What's the sense of studying? You're still going to get a low mark!" exclaimed Odd.

"Ugh, I've heard that twice already, that's enough," said Ulrich.

"Hey, listen to what I downloaded from the Web! It's out of sight! "Under my Cover"! By RU Flicknight! It's incredible!" said Odd as he offered his headphones to Ulrich.

"Maybe later. I want to study for the moment. And as for you, I wouldn't say no to your helping me a little. You're so good in physics!" said Ulrich.

"That's right! And if you want help, the reincarnation of Einstein is willing to give a lesson to a sawdust-filled head!" said Odd enthusiastically. "Even Harry doesn't get why I'm so good at physics since I'm so bad at maths!"

"I'll listen to your song afterwards," said Ulrich.

"You don't really have to. Actually, it's pretty mainstream. It's something that…what I mean is…" Odd stumbled for words.

"It's the kind of song a machine might've written?" asked Ulrich.

"Yeah, that's right. See, you know a lot about music!" exclaimed Odd as he walked over to the desk.

"So you're going to help me or what?"

Harry's and Jeremy's dorm

"Well, at least no one died," said Harry as he continued to read his mum's diary.

"That's a relief," said Jeremy. "Found out anything new?"

"My mum has just got married and that's the end of the diary. I'm going to get the next one out when I have time. There's nothing more about Uncle Waldo and my cousin."

"That's a pity."

"I know." Harry picked up his laptop and started to program.

"What are you programing now?" asked Jeremy. "You haven't gotten anywhere on the vehicles so…"

"I'm programming a monster and I'm going to put its data behind a strong firewall to keep Xana out," explained Harry.

"Good luck with that. Are you going to give it an AI program?"

"A really limited one. Nothing like Xana's, I hope."