Okay. I'm sorry for the VERY long wait I have made some of you endure. I'm just going to admit it...

I had writer's block.

I knew where I wanted to go, but I wasn't sure how to get there. So here we are! Some plot advancement! Yay!

I hope you enjoy this chapter, thank you for reading!

Crumbling. Crackling. The sound of fire consuming and rubble moving was all Peggy heard when she forced her eyes open. The last thing she remembered was looking at Steve's determined face, aged slightly since she last saw him, but only slightly. His eyes gave away his age. Sadness was laced into that blue that she had longed to see for what seemed like ages to her, but had only been a couple years compared to his 50. The only thing she remembered after his call for action, was only black.

Peggy looked around her, smelling the air for a source of the blast but only could smell a strange rotten egg smell. She began to move her body, each individual muscle aching and burning. She tried in vain, but could only manage to move her arms. Her hand began to feel the rubble next to her, her eyes still straining to fully see what was around her. All she felt was rock and metal, which she carefully ran her hand over as to not potentially cut herself. She felt only stone and metal, but then she felt a warm and smooth surface, that was definitely alive as it slightly moved at her touch. She looked over, her eyes beginning to clear, and saw the girl, Skye she believed she was called, lying next to her with a gash across her forehead but still alive regardless. She looked down at her hand, which was near the hers, reached it and squeezed gently as to get her attention.

"Skye," Peggy weakly said, surprising herself with her hoarse voice. "Are you alright?"

Skye only groaned in response, her body barely moving at all. She let go of her hand and began looking around the space she was in with her cleared eyes. Bits of rubble fell from the ceiling to the ground and falling down the mountains of siding that had gathered in the room. Observing the room in its entirety, she noticed the doorways were blocked and she located the others. They were scattered around, some only just coming to as Peggy had and noticing the disaster struck room around them.

Steve had been barely affected by the blast and was tending to someone that she couldn't see through the rubble. Sitting up, she realized her body was essentially unharmed, just sore from being thrown across the room.

Obviously, Peggy thought to herself.

She stood up, a bit shakily, but she began to walk over and assess the rest of the damage.

"Son of a bitch," Dean hoarsely moaned. Peggy's head snapped over and noticed that he, Sam, and the "angel" had been thrown right at her feet. He rubbed his eyes with the heel of his hand. "What was that?"

Scornfully, Peggy glared down at him, but also with a twinge of boredom in her expression. Sighing, she then said, "What do you think it was?"

"It was the Shadow," the angel, Castiel said, opening his eyes and finally coming to. He sat straight up and pulled himself into a standing position, dusting off his jacket a bit on the shoulders where bits of rubble had collected. The entire event left him unfazed. Peggy stared at him like he had grown a second head. As Dean opened his mouth to make a comment on his boyfriend's behalf, there was the sound of a crash outside the blocked room. Everyone else that had slowly been waking up and coming back to consciousness shot straight up. Natasha had sprung up ready to fight anything and nearly floored the person in front of her, which just so happened to have been Clint, unfortunately for him. Surprisingly, no one had been seriously injured, but they all had one hell of a headache.

The crashing continued and grew louder, signifying it was growing closer. It grew louder and louder, prompting those standing to start to help those on the ground to their feet and bring them to the middle where everyone began to stand back to back in a circle. They each were ready, in their signature fighting stances. Steve had found his shield, dusted off the bits of glass and dirt from it and held it in his hand. Feeling naked without her gun, Peggy had picked up a pipe that was laying on the ground amidst the rubble from the blast. Skye had finally come to, her gash not being as deep as it seemed, but blood still dripping down her nose. She was slightly woozy but Fitz and Simmons stood on either side for support. Wanda and Peter stood next to each other and the rest of the avengers, as well. As the crashing finally grew to as loud as it possibly could, it ceased. The circle stood motionless and silent, waiting for whatever was to come. Each could somewhat hear something from the other side of the wall, but it was unclear if it was a person...or thing, or just bits of the building falling.

"Huh," Dean said, breaking the silence. "Maybe it-"

A loud crash interrupted him, a big hole being formed in the wall that he was facing accompanying the sound. Through the hole came a very distressed Doctor, that was missing his iconic tweed jacket. His shirt was covered in ashes with holes burned through in places. His hair was a mess, contrasting the neat and artistically messy hair everyone had saw him with only an hour or so earlier. He landed on the floor, rolling to take out the impact of the fall. Stopping on his back, he caught his breath and closed his eyes as his hearts raced.

"Um, Doctor?" Peggy asked, really confused about what just happened, along with the many others in the room.

"Yeah, yeah, you're probably wondering what the hell I was just running from," the Doctor said breathlessly. He took one deep breath and stood up quickly with a smile. "Good question, well, you see I woke up in the TARDIS, which has gone through the floor for some odd reason, and I knew I had to make my way back up here. I found the stairwell through this mess of a building, speaking of which, do you know how boring stairwells are? I quite prefer a-"

"Doctor." Peggy asserted, prompting him to get to the point.

"Oh yes, sorry, got off on a tangent. Where was I? Oh! I got to the top of the stairs and I saw a black smoke approach me. It filled my nose and it burned as it filled my body. It realized how much bigger on the inside I was, how massively complex my brain was compared to humans. I fought this smoke, it was more than just smoke, it seemed sentient, as if it were alive and capable of thought. I battled it, I'm surprisingly familiar with internal battles for my brain, so the concept and strategies weren't new to me."

The Doctor's speech was increasingly making everyone uncomfortable. He seemed too alright, too okay for someone who had fallen through the floor and had seemingly been burned. He looked like he had gone through hell, but he didn't feel a thing. Sam and Dean grew very suspicious at the mention of black smoke. They kept looking at each other while the Doctor was talking, but he never noticed.

The Doctor continued, "I talked to the black smoke, it was actually a quite intelligent conversation. But then I learned the smoke's true name. In fact, it wasn't smoke at all, it was just a temporary form."

"Doctor," Dean moved towards him slowly, with a concerned expression on his face. His sudden seriousness and taking over for the group was new to everyone, but they quickly accepted it. "What was the smoke?

"You know, at first I thought it was a demon. I wasn't worried, demons are normal and are actually all around the world. I knew they could only inhabit human bodies, but that I would still have to cast them out as one does swat a fly. But the battle wasn't easy, and I grew weaker by the second."

Peggy looked to Steve with a worried expression, then stepped up next to Dean. She asked, "Then what was it?"

The Doctor blinked, his eyes switching to a complete and absolute black. Everyone backed away slowly from him, the few with weapons gripping them tighter in anticipation of an attack. The Doctor smirked and his carefree expression that he always wore turned dark as night.

"I call myself the Shadow."