Completely forgot to update yesterday. Sorry! In return I've posted a longer chapter. Hope you enjoy!

Chapter 10 – Skin

The episode began as usual with the recap but then it showed a team of police officers entering a house to save a girl who was tied up and beaten. She was still alive but hurt bad. They found the man who did it. It was Dean.

'What the…?' Mary asked.

'Oh. Don't worry mom. It wasn't me.' Dean replied.

'What do you mean? It sure looked like you.' Mary argued.

'You'll find out.' Dean answered.

'Boy this was a messed-up case.' Sam commented.

The scene cut to Sam and Dean in the car. Sam was on his phone and Dean tried to get his attention.

'Sam wears women's underwear? That's what you used to get my attention?' Sam asked.

'It worked, didn't it?' Dean responded.

Sam then told Dean that he was looking at messages from his college friends and Dean told him he couldn't have those connections.

'Dean's right you know.' John said.

'No he's not!' Mary replied angrily 'I have plenty of hunter friends!'

'Yeah. Mom's right. You don't need to cut yourself off or lie to people.' Dean said.

'You clearly didn't think that then.' John said as Dean told Sam that he couldn't get close to people and Sam called him anti-social.

'You are anti-social.' Sam said with a smile.

Sam then saw a message saying that one of his friends had been arrested for murder.

'What kind of friends do you have?' Cas asked.

Sam then convinced Dean to go and check it out and they left for St Louis. They then met Becky who said that Sam's friend, Zac, could only have committed murder if he'd been in two places at once but that there was CCTV footage that incriminated him.

'That definitely sounds weird.' Cas said.

'Yeah. Though Dean didn't believe me.' Sam responded.

Sam then told Becky that Dean was a cop who could help them if she took them to the crime scene.

'And you call me a bad liar.' Dean said.

They then visited the crime scene and found that Zac's clothes were stolen and that a dog became psycho around the time of the murder. Dean said they should look at the tape that incriminated Zac just to make sure but that he didn't think it was their kind of job.

'Just to make sure, right?' Sam said.

'Yeah, whatever. I was wrong.' Dean said sarcastically.

'Nice to hear you admit it.' Sam said and Dean rolled his eyes.

The scene then showed someone who looked like Zac spying on a young couple and his eyes appeared to flash.

'So, is it some kind of shapeshifter?' John asked.

'Damn right. An annoying one at that.' Dean replied.

Sam and Dean then noticed that Zac's eyes flashed in the CCTV footage that incriminated him and theorised that the murder could have been committed by some kind of dark double.

'A dark double. Really?' John asked.

'Whatever. We hadn't done many cases at this point.' Dean replied.

The scene then went back to the young couple. The man returned from work to find his girlfriend tied and up and beaten. When his girlfriend appeared to be afraid of him he turned and saw a double of himself who then knocked him out.

'Oh, was it a shapeshifter? At the beginning?' Mary asked and Dean nodded.

'That is not going to look good to the cops.' John said.

The scene then went to Sam and Dean who were outside Zac's house and had found a trail. Dean complained because it was 5.30 in the morning.

'I hate it when you make me wake up early.' Dean said.

'The trail may've disappeared if we'd have gone later.' Sam replied.

They then found out that the man had been arrested and that he had been in two places at once. They then realised that it was a shapeshifter and Dean finally decided that it was their kind of problem.

'He didn't admit that he was wrong though.' Sam said and Dean rolled his eyes.

Sam and Dean found the end of the trail and realised that the shapeshifter used the sewer system to get around.

'That is disgusting.' Mary said as they found the skin after they went down into the sewers to look for it.

Sam and Dean went back to the car when Sam got a call from Becky who had found out that Sam had lied about Dean being a cop.

'Why do they always have to check the ID. It's so annoying.' Sam said.

'They do it for exactly that reason.' Cas replied, 'To find people like you who impersonate police officers.'.

Sam and Dean went back into the sewers. Dean's shoulder was hurt by the shapeshifter who ran above ground but they split up and lost him in the crowds on the street.

'Not a good idea to split up with a shapeshifter, boys.' John commented.

When Sam and Dean met up again they see Dean's eyes flash.

'Oh God. What happened to you?' Mary asked.

'I got attacked.' Dean replied.

'Fortunately, I was quick on the update.' Sam replied as Sam realised that the shapeshifter was Dean and threatened to shoot him.

'Why didn't you shoot him?' Dean asked.

'In case I was wrong.' Sam replied.

'Could have shot it in the leg.' Dean continued.

'Didn't think of it.' Sam responded.

Sam was then knocked out and the shapeshifter talked about Dean's 'feelings' towards his family. John realised that he had never considered the fact that they might want a normal life and he blamed himself because he had brought them up in a way that meant they never could.

'Was any of that true?' Sam asked.

'Some of it. Though he exaggerated a lot. Although he was right. I would've banged Becky if I had the chance.' Dean said with a grin, and Sam rolled his eyes.

'How come it can see your memories?' Cas asked.

'That's a good question. I didn't know they had that ability.' John replied.

'What do you mean the handsome one?' Sam asked as Dean said that the shapeshifter picked the handsome brother.

'I am better looking.' Dean said and Sam rolled his eyes again.

The shapeshifter then went to Becky's house. Meanwhile, Sam and Dean escaped their bonds and got out of the sewers.

'That would be stupid.' John said when Sam suggested calling the police and putting an APV out on Dean.

'Why do I actually feel sorry for the shapeshifter?' Mary asked as the shapeshifter talked about how lonely it was.

'I never knew shapeshifters were a product of evolution.' John commented.

The shapeshifter then attacked Becky and escaped into the sewers but not before he made sure the police saw him.

'So that's what happened at the beginning.' Mary said, happy that she finally understood. For a while she was worried that Dean had become a ruthless interrogator like her father.

'That's vile.' John said as the shapeshifter shed its skin.

Sam and Dean then found out that Dean was now a wanted man as the shapeshifter had attacked Becky.

'You never told me you were a wanted man.' John said with a smile.

'Of course, you care about him driving the car more than anything else.' Mary said with a sigh as Dean was angry at the thought of the shapeshifter driving his car.

Sam and Dean then went to Becky's house to find the car and get bullets but soon enough the police arrived.

'How did you get out of this one?' Cas asked

Dean ran off and Sam shouted at him to not go into the sewers. Sam stayed behind to confront the police. Sam told Dean to meet him at Becky's house in the morning.

'I guess you didn't listen to that one.' Cas said as Dean went into the sewers alone.

Dean then found Becky in the sewers.

'Does that mean Sam is with the shapeshifter?' Cas asked and Sam nodded.

The scene cut to Sam at Becky's and he was attacked by the shapeshifter who knocked him out and turned into Dean again.

'Why does the shapeshifter think he's me? It's creepy how he has my memories.' Dean said, looking confused 'And why does it want to frame me for murder? What did I do to piss it off?'

'I don't know. I think it just likes causing mayhem.' Sam said as the shapeshifter attacked Sam.

'Still can't kick my ass even when I'm a shapeshifter.' Dean said with a satisfied grin on his face as the shapeshifter got the upper hand in the fight.

'Shut up. I almost got you.' Sam said

Dean and Becky then arrived and Dean shot the shapeshifter.

'Served it right. Pretending to be me.' Dean said.

Sam and Becky then said goodbye.

'She seemed nice.' Mary said with a smile.

'So, you technically went down for murder.' Mary said.

'Yep. Not the last time either.' Dean said, making Mary wish she hadn't said anything.

Sam and Dean then drove away.

'I wish both of you could be normal.' Mary said as Dean told Sam that he wished Sam could have a normal life and go to college. John buried his guilt that he'd got angry at Sam for leaving.

'Yeah, well. It never works out.' Dean replied, 'For either of us.'