Clara heard the shotgun go off once in her direction as the entire ceiling of the operations centre collapsed, showering her in a haze of dust and rubble as she managed just get herself onto the platform in time. She left it thirty seconds before even attempting moving.

Her vision was blurry initially. It eventually began to focus through the dust. There were large pieces of concrete and twisted metal everywhere she looked, flattened office chairs and computers strewn in between. A pale hand holding the shotgun was visible six feet in front of her, poking out from under a large steel ceiling support. Clara could now hear alarms ringing and the beeping of unhappy machines. She could see two small fires in her field of vision, presumably computers or equipment that had overheated.

She sat up, trying to resist rubbing the dust out of her eyes with her dirty hands. A heavy slab of concrete was resting on her left leg, she was only now just able to feel its weight crushing her leg onto the edge of the platform. She pushed it off with some difficulty, groaning but then noticing with relief that her leg wasn't broken. Her right hand had intense pins and needles, she looked at it to see the barcode had returned.

"Is everyone OK?" Clara shouted out, swimming in her own thoughts, fighting the severe pain. She hauled herself to her knees, turning back towards the table to look around at the group. The video screens around the perimeter had mainly turned off, except for the occasional intermittent flash where a feed glitched. She shook out her right hand to try and subside the numb feeling.

There were shouts of acknowledgement around her. The ceiling above the platform was now at an almost forty five degree angle, much lower on her side.

Trudi was getting to her feet to her right, unhooking her leg from the twisted deformed banister of the stairs. She stood up, holding her head, inspecting her fingers afterwards as they were covered in blood coming from her right forehead.

"Trudi, you ok?" Clara asked, forcing herself to stand up, wincing in pain. The ceiling was two feet above her head on this side.

Trudi nodded in response. "Fine," she paused, touching her head again, "I think."

Kodey and Sky were emerging from beneath the undamaged table on the other side, both apparently unharmed. Sky was crying loudly, rubbing her eyes. Leon was lying on top of Flack to her left, yet to stand up. Francis had got to his feet, he was removing dust from his torn jacket. He caught her looking and flashed a wide smile back in her direction.

"Leon?" Clara asked, grimacing loudly as she put weight on her left leg to find the pain almost unbearable. She gingerly hopped towards them, holding on to a still intact metal support on her left. "Leon?" she repeated.

Leon rolled off Flack and got to his knees with some difficulty. "Flack," he said, pushing him on the shoulder roughly, "wake up."

Flack laid motionless on the floor, not making any noise.

"Flack?" Leon leant over him, instantly standing up and backing away a few paces. He felt down his black jumpsuit, noticing a large wet patch on the stomach, patting it down. He pulled his hand away and realised that it was covered in a thick red liquid. "Flack!" he repeated, kneeling down next to him, shaking his shoulders.

Clara was able to see a small pool of the same liquid slowly seeping out around his stomach onto the floor. There was a collection of small holes on his chest, and now she looked closer, his neck was positioned at a strange angle, his face white. She was unable to move, frozen to the spot.

"No, no, no... No!" shouted Leon, banging on Flack's chest. He put his left hand on Flack's right cheek, trying to wake him up. "Come on, wake up!" he shouted. Trudi moved from Clara's right to crouch down on Leon's left, putting her right arm around his shoulders.

Kodey and Francis stood on the other side of the platform with their mouths open. Francis found a nearby chair that had been upended, he set it on the floor and sat on it, head in his hands. Sky had broken free from Kodey's grip and had begun running towards Clara, impacting painfully heavily with her legs, hiding behind them.

"Wake up," Leon said quietly, resigned to what had happened. "Please…" he begged, "wake up."

"Leon," Trudi said softly, holding him tightly, "Leon, come here, he's gone Leon."

"No!" Leon shouted loudly.

Clara moved towards Flack's head. "Sky," Clara said as gently as she could, her whole body shaking with shock, "go back with Kodey for a minute, something has happened to one of our friends that is not very nice, and I don't want you to be frightened, do you understand?"

Sky nodded, skipping back off in Kodey's direction.

Clara knelt down, scraping her cut knee on the floor, touching Flack's impossibly pale neck with her right index and middle finger, feeling for a pulse. She felt nothing, repositioning her hand several times to make sure she had the right place, knowing it was a lost cause. She took her hand away and lowered her head, shaking it to herself. She put her left hand on Leon's right shoulder as Trudi embraced him in a tight hug.

"Leon," Trudi said, "I'm so sorry."

"I've known him since he was eight years old," he began sobbing into Trudi's shoulder.

"I know, I know," Trudi said, cradling Leon's head in her hands.

Clara stood up with some difficulty, trying not to grimace, to leave them alone. She limped to the edge of the platform where her leg had been crushed, sitting down a few steps from the bottom of the spiral staircase. Francis caught her eye, raising his eyebrows, she shook her head silently back at him.

She had seen many people die whilst on travels with the Doctor, she had even lost a few people when the TARDIS had shrunk in Bristol, but this was the first person who she'd lost being on her own. She looked out at Roo's hand amongst the rubble, still clenching the shotgun. Further away she saw Charlie's leg mixed in with a pile of broken up concrete. She was finding it hard to feel any remorse for the other two, both willing to commit mass murder in order for personal gain.

Leon continued sobbing to her right, not moving. Clara rested her elbows on her knees and cradled her head, feeling a small tear trickle down from her right eye as she thought about Flack lying there motionless, his life extinguished in an instant.