Castiel and I walked into the bunker because Dean had called us.

Dean was in the library, packing up every kind of weapon he owned into his duffle bag on the table.

"Dean," Castiel told him.

Dean looked up. "Cas. Ava."

"We, um... we came as soon as you called," I told him. "I wa--" I looked at the broken lamp on the floor, looking over the strewn books and papers and the broken chair. I looked at him in concern. "Dean, what happened? What's wrong?"

Dean stopped packing, looking at us, his emotionless mask melting away.

  *       *  

We were sitting at the table.

Dean told us everything. "Sammy was dying. What was I supposed to do?"

"You let an Angel possess him?" I asked.

"He said it was the only way, and I believed him," Dean told us. "Now Sam's gone. Kevin's dead."

"Dean, I'm sorry," Castiel told him.

"Yeah, well, sorry don't pay the bills, does it?" Dean asked. "It sure as hell ain't gonna bring Kevin back. We got to find that son of a bitch."

"Dean," Castiel told him. "If the Angel possession Sam isn't Ezekiel, then who is it?"

"A dead man walking," Dean told us.

"What, you're gonna destroy him?" I asked.

Dean nodded. "Damn right."

"You kill an Angel, its vessel dies, too," I told him.

"Think I don't know that?" Dean asked. "If I don't end Sam and that halo burns him out, and I... God, I was so damn stupid."

"You were stupid for the right reasons," Castiel told him.

"Yeah, like that matters," Dean told us.

"It does," Castiel told him. "Sometimes that's all that matters."

Dean looked up, expressionless with guilt and devastation.

I looked between them. "Listen to me. Sam is strong. If he knew an Angel was possessing him, he could fight. He could cast the Angel out."

"Maybe," Dean told us. "But as far as I know, he's in the dark. I don't know how we clue him in."

"Do you remember Samandiriel?" Castiel asked.

I nodded, remembering him from Heaven.

"Alfie?" Dean asked. "The kid Angel? Yeah. Why?"

"Before he died, he told me the Demons were able to dig into his mind, access his coding," Castiel told us. "We might be able to do that here. Might be able to--to bypass the Angel and talk directly to Sam."

"And you think that would work?" Dean asked.

"I don't know," Castiel told us. "But I think we should try."

"Okay," Dean told us. "Um, where do we start?"

I looked between them in confusion, raising my eyebrows in surprise. "Samandiriel's dead?" I looked at Dean in confusion. "Why did you call him Alfie?"

Castiel and Dean didn't know how to answer, both looking guilty for yet another thing that I was left out of the loop for because I had been dead at the time.

  *     *  

Castiel, Dean and I walked into the dungeon where Crowley was chained to a table within a Devil's Trap.

"Here's the deal," Dean told him. "You're gonna tell us how to hack an Angel, and I'm gonna give you some of the good stuff." He held up a syringe of blood. "Human blood, fresh from the tap." He patted his own arm. "Word is you're jonesing for it."

"Please," Crowley told us. "I'll pass."

"What do you want, then?" Dean asked.

Crowley looked at me. "Well, for starters, a massage. Between the sitting and the shackles, a body gets a little stiff."

"Yeah, I'm not touching you unless it's to kick your ass again," I told him.

Crowley smirked. "Figures. Although, save the sex torture stuff for the bedroom. What it'd be like to see you in stilettos and a leather buster really going into S & M for your S.A.M."  

"No," Dean told him.

"No?" Crowley repeated. "Of course not. Because if I'm Plan A, I'm sure you have a totally viable, much better Plan B."

Castiel and I pulled Dean aside.

"You can't be considering this," Castiel told him.

"With the chains on, he can't do anything," Dean told us.

"It's Crowley," I told him. "He can always do something."

"Looks like you need someone on your side, Squirrel," Crowley told him. "Go get Moose." Dean looked down guiltily. "Unless... unless of course, you can't. That's why you're here, isn't it? The poor giant baby's in trouble again, isn't he?"

"Are you done?" I asked.

"Depends," Crowley told us. "Do we have a deal?"

"Yeah," Dean answered.

"Excellent," Crowley told us. "When do we leave?"

"Soon as I can scrounge up a ride," Dean answered.

"Well, we have a vehicle," Castiel told him. "We stole it on the way. We would have taken Ava's, but that got left back at the motel we were taken from." Dean looked at us in confusion. I nodded. "My car's stopped a few miles from here, inexplicably."

I resisted the urge to roll my eyes.

  *     *  

Castiel, Crowley, Dean and I walked down the street toward Castiel's car.

Crowley's cuffs were covered by his jacket folded over his arm.

Dean was carrying a gas can.

Castiel's car was a cream colored 1978 Lincoln Continental.

Crowley looked at Castiel skeptically. "Really? What are you, a pimp?"

"I like it," Castiel told us.

I tried to start the car. "Yeah, it's out of gas." Dean started to fill the gas tank with the can. I frowned. "I miss my car."

"Riddle me this, Wonder Twins," Crowley told us. "Why do you two need the wheels?"

Castiel and I exchanged a look.

I looked at Crowley. "When you betray us, I'll be the one to carve out your heart."

"Oh, Ava, such a flirt," Crowley told me.

Dean finished filling the gas tank with the can. "All right. Let's go."

"Shotgun," Crowley told us.

"Uh, wrong," I told him. "You're in the back." Castiel looked at Crowley smugly, smirking, stepping toward the passenger seat. I pointed at Castiel. "Hey, you, too. Keep an eye on him."

Castiel gave me a look.

I shrugged innocently.

Crowley looked at Castiel smugly, smirking, getting into the backseat.

Castiel got into the backseat next to Crowley.

"Hey," Crowley told him. "Watch the leg."

"You're on my side," Castiel told him.

Dean got into the driver's seat of the car, looking at Castiel and Crowley. "Hey, hey, hey!"

I rolled my eyes, sighing in exasperation, getting into the passenger seat.

  *      *  

Castiel, Crowley, Dean and I sat in a lobby of a fancy office financial association building.

Dean looked at Crowley. "Your source is in here?"

"And she can track anything you need, even our little lost Samantha," Castiel told us.

"How?" Castiel asked.

"Well, this place isn't really... this," Crowley told us. "It's a front for an NSA listening post."

"What are they listening for?" Castiel asked.

"Everything," Crowley answered. "The US government is quite the voyeur these days. So, I planted one of my best and let her go to work."

"Looking for terrorists?" Castiel asked.

"Looking for marks, slow boat," Crowley answered.

Two security guards approached.

"Mr. Crowley?" Guard 1 asked. "She'll see you now." Castiel, Crowley, Dean and I stood. "Uh, just Mr. Crowley."

I looked at Crowley. "I'll be listening to every word you say."

"Promise?" Crowley asked.

The guards led Crowley away.

  *        *  

Dean, Castiel and I were sitting down again.

Dean looked at me. "Hear anything?"

"No," I answered. "The room Crowley's in has been warded."

"Awesome," Dean told us sarcastically. "That's freaking awesome."

  *       *  

Crowley was back, handing me paper with pictures of the Impala going through an intersection. "Your phallus on wheels just ran a red light in Somerset, Pennsylvania, 10 minutes ago."

"Let's go," Dean told us.

"And we ride again," Crowley told us.

"Stop talking," I told him, pushing Crowley toward the door.

Dean and Crowley followed.

  *      *  

Dean, Castiel and I walked up to the house that had the Impala outside.

Dean walked inside.

Castiel looked over the Impala, finding the weapons in the trunk.

I walked inside.

An Angel's dead body was on the floor, his throat slit.

Kitchen water was running.

Sam/Angel was washing blood off his hands in the sink. "You should not have come here, Dean."

"You killed my friend, then you take my brother, and you think I'm gonna let that stand?" Dean asked.

"I allowed you to live," Sam/Angel told him. 

"Mistake," Dean told him, lunging for Sam/Angel.

Sam/Angel used music to push Dean back into a bookcase, making him fall unconscious, stepping closer to Dean to go in for the kill. I stood behind him. Sam/Angel sensed me, turning to face me.

"Sorry, Sam," I told him, punching Sam/Angel in the face with much force.

Sam/Angel fell to the floor, unconscious.

  *      *  

Dean, Castiel, Crowley, Sam/Angel and I were in an abandoned warehouse after dark.

Sam/Angel was tied to a chair with warded handcuffs and in a chin and head restraint. He regained consciousness.

"Welcome to the party, pal," Dean told him. He looked at me. "Ava, how we looking?"

"Most of Sam's internal burns have healed," I told them. "I should be able to fix the rest." I looked at Sam/Angel. "What's your name? I thought I knew every Angel in Heaven, but I've never seen you."

"Why would I tell you anything?" Sam/Angel asked.

"Well, I don't give a damn who you are," Dean told him. "You need to get out. Now."

"And if I don't?" Sam/Angel asked.

"Then you and I will have a lovely little play date," Crowley answered.

"Even bound, I can rip this body apart," Sam/Angel told us. "Tell them, Castiel, Octavia."

"You do, you die," Dean told him.

"You want this to end?" Sam/Angel asked. "Go ahead. Put a blade through your brother's heart. If it makes you feel better, I have Sam locked away in a dream. As far as he knows, the two of you are working a case right now. Something with Ghouls and cheerleaders."

"Why are you doing this, huh?" Dean asked. "We fought together. And I trusted you. I thought you were one of the good guys."

"I am doing what I have to do," Sam/Angel told us.

"Well, so am I," Dean told him, nodding to Crowley.

Crowley stood, picking up a large thick needle from a tray, walking toward Sam/Angel. "So am I."

Crowley put the needle into Sam/Angel's temple, starting to twist it, making him scream in pain.

Dean's expression hardened. He checked his watch.

I felt uncomfortable watching the torture of Sam's body, looking away.

Crowley pushed more needles into the front of Sam/Angel's forehead and into his other temple, making him scream in pain.

Dean was having a hard time in dealing with it, finally walking away.

Castiel followed Dean out into the hallway.

I stayed with Crowley and Sam/Angel to keep watch over them.

  *      *  

Crowley finally got somewhere with this, calling out into the hallway to Dean and Castiel. "Laverne! Shirley! Get in here!" Dean and Castiel walked in. "Pinhead's out cold, but watch this."

Crowley twisted two of the needles in Sam/Angel's left temple.

Sam/Angel took a deep breath, chanting in Enochian. "Zir noco iad Gadreel. Zir noco iad Gadreel."

"What's he saying?" Dean answered.

"His name," I answered. "Gadreel."

"Does that mean something to you?" Dean asked.

"Well, it's why we've never seen him," I told them. "He's been imprisoned since the dawn of time. Gadreel was the sentry who allowed Lucifer into the Garden."

"My, my," Crowley told us. "A celebrity."

"Wait, the Garden?" Dean repeated. "Like, Eden. Adam and Eve? Fig leaves Garden?"

"It's his fault," Castiel told us. "All of it. The corruption of man, Demons, Hell. God left because of him. The Archangels, the Apocalypse. if he hadn't been so weak, none of it would have happened." He was overcome with white hot rage, starting to shake the unconscious Sam/Gadreel. "You ruined the universe, you damn son of a bitch!"

I pulled Castiel back, turning to face him. "Cas! Cas, hey!"

"Ava, he--" Castiel started.

"I know," I told him. "But you got to chill."

Crowley continued to probe the needles into Sam/Gadreel's head.

Dean was getting impatient. "What's taking so long?"

"Other than the fact that I'm trying to unravel a living, multidimensional knot of pure energy, not much," Crowley told us.

Sam/Gadreel gasped awake. 

Dean looked as if he was hoping it was Sam's consciousness.

"It won't work," Sam/Gadreel told him. "You will never find your brother. Go ahead. Poke and prod. I can sit in this chair for years and watch you fail over and over again. I've endured much worse than this, Dean. So... much... worse. And I have all the time in the world."

"Shut up," Dean told him. "All right, Plan B. Ava, you got to possess him."

"What?" I asked.

"Someone has to get in there, tell Sam what's going on, and help him kick that lying son of a bitch out," Dean told us.

"It might work," I told them. "But I can't possess a vessel without permission."

Crowley cleared his throat, raising his hand as a volunteer.

"No," Dean told him. "Not happening."

"Don't be daft," Crowley told us. "Demons can take what they want. I can burrow into that rat's nest of a head. I can wake Sam up. Just call me Plan C."

Castiel looked at Dean. "You can't--"

"You got a better idea?" Dean asked. Castiel didn't answer. Dean looked at Crowley. "What about the Angel?"

"I'll work fast," Crowley told us.

"And if he finds you?" I asked.

"I'll run," Crowley answered. "I'm not dying for you lot. Of course, if I do this, you're gonna have to..."

"Take off the leash," Dean finished. "Yeah, I know."

"And it stays off," Crowley told us. "I save Sam, I leave here a free man. Do we have a deal?"

"Ava, burn off Sam's tattoo," Dean told me. 

"Dean,"  I told him.

"Do it," Dean told me. "Do it." I hesitantly walked toward Sam/Gadreel, pulling down his shirt collar to reveal his Anti-Possession Tattoo, using magic light to burn the tattoo off. Dean looked at Crowley. "If you mess with Sam, if you try anything--"

"I keep my bargains," Crowley told him. "Besides, I don't want to be inside your brother any longer than I have to. I'm not one for sloppy seconds."

I unlocked the chains from Crowley, gathering them around one hand.

Crowley smirked. 

"When you find him, say, 'Poughkeepsie'," Dean told him. "It's our go word. It means 'drop everything and run'."

Crowley sat in a chair across from Sam/Gadreel. "Fine. While I'm gone, hands off the suit."

Sam/Gadreel glared at Crowley. "I will destroy you."

"Eat me," Crowley told him.

A cloud of red Demon smoke poured out of Crowley's mouth, into Sam/Gadreel's mouth.

  *      *  

Dean, Castiel and I were waiting next to Sam's unconscious body.

Dean was pacing. "A Demon and an Angel walk into my brother. Sounds like a bad joke."

"If this doesn't work..." Castiel trailed off.

I looked at Dean and Castiel. "It'll work."

  *      *  

White Angel Grace poured out of Sam's body.

Dean, Castiel and I ducked instantly.

The Angel Grace flew out of the warehouse, leaving.

  *      *  

Red Demon smoke poured out of Sam's mouth, into Crowley's body.

Sam gasped, regaining conscious.

Dean and I instantly walked closer.

"Sam!" Dean told him.

"Dean?" Sam asked.

"I'm fine," Crowley told us indignantly. "Thanks for asking."

I removed the needles from Sam's head. "Sam, are you okay?"

"Ava?" Sam asked.

Headlights flashed into the window.

Castiel walked toward the window to look outside.

Dean un-cuffed Sam.

Castiel looked at us. "It's Abaddon."

"Go," Crowley told us. "The back door. I'll handle this."

"Oh, 'cause you're such a good guy?" Dean asked sarcastically.

"Right now, I'm the goodest guy you got," Crowley replied.

"This don't make us square," Dean told him. "I see you again--"

"I'm dead," Crowley finished. "Yes, I know. I love you, too." Dean and I took either of Sam's arms, wrapping them around our shoulders, helping him walk toward the door. Castiel held the door open for us. "Pleasure doing business with you all, as always."

Dean, Sam, Castiel and I walked out, leaving.

  *      *  

Dean, Sam, Castiel and I were on a long dock in the drizzling rain.

I slowly moved my hand over Sam's head, healing all of his wounds.

Sam swayed unsteadily.

"You feel better?" I asked.

"A little, yeah," Sam answered.

"It'll take time to fully heal you," I told him. "We'll have to do it in stages."

Sam nodded in agreement. "I guess this means you can't avoid coming around for our safety anymore."

I gave him a half-hearted, gentle look.

Sam barely managed a smile, letting it fade, looking unsteadily at Dean.

Dean walked closer with reservation.

Castiel and I backed away far enough to give them their space.

Dean looked at Sam. "All right. Let me hear it."

"What do you want me to say?" Sam asked. "That I'm pissed? Okay. I am. I'm pissed. You lied to me. Again."

"I didn't have a choice," Dean told him.

"I was ready to die, Dean," Sam told him, emotion clouding his voice.

"I know," Dean told him. "But I wouldn't let you, because that's not in me."

"So, what?" Sam asked. "You decide to trick me into being possessed by some... psycho Angel?"

"He saved your life," Dean told him.

"So what?" Sam asked. "I was willing to die. And now... Kevin..."

Sam had tears of guilt in his eyes.

"No," Dean told him. "That is not on you. Kevin's blood is on my hands, and that ain't ever getting clean. I'll burn for that. I will. But I'll find Gadreel. And I will end that son of a bitch. But I'll do it alone."

"What's that supposed to mean?" Sam asked.

"Come on, man," Dean told him. "Can't you see? I'm... I'm poison, Sam. People get close to me, they get killed... or worse. You know, I tell myself that I--I--I help more people than I hurt. And I tell myself that I'm--I'm doing it all for the right reasons, and I--I believe that. But I can't--I won't... drag anybody through the muck with me. Not anymore."

Dean looked at Sam pleadingly.

"Go," Sam told him. "I'm not gonna stop you." Dean looked defeated, looking toward Castiel and me, slowly turning to walk away. "But don't go thinking that's the problem, 'cause it's not."

Dean stopped. "What's that supposed to mean?"

"Just go," Sam told him.

Dean slowly walked toward the Impala.

I walked closer to stand next to Sam.

Castiel stepped closer.

Dean unlocked the car, slowly getting in, driving away, leaving us in the rain.