As soon as the van pulled into the car park of St James' hospital Sam had already unbuckled her seatbelt and was reaching for the door. Tom placed a hand on her shoulder in an attempt to slow her down but she simply shrugged him off and headed for the closed ED doors at full speed.

As soon as she was in the building she headed for the nearest lift and punched in the number of the floor her destination laid at the last time she saw him. Just before the lift doors closed she saw Tom and Zoe running full pelt towards the lift, tying to catch up with her. She assumed after they failed to make it they were most likely heading up the stairs, however she doubted they'd know where she was going a she still hadn't told them a thing.

When the lift doors finally opened on the desired floor a porter stepped in and Sam stepped out, quickly hiding around the corner of a nearby corridor to avoid the stair well Tom and Zoe had busted out of. They took one look at the numbers on the lift going back down and Tom let out a frustrated moan.

"Where the hell is she going now?" Tom shouted before he and Zoe headed back down the way they came.

Sam would have laughed if she wasn't so worried about the danger the hospital was in.

She quickly ran past the stairwell when the sounds of Tom and Zoe's thundering footsteps echoing around the small space told her they were at a suitable distance away and headed back to the ward she was on for most of her stay here.

When she finally reached her destination and burst though the double doors at the back of the ward several nurses jerked their heads up in surprise. Sam didn't bother sparing them a glance, instead hurrying towards the bed next to hers with the curtains pulled around it.

She whipped back the curtains with a flurry and was greeted by the sight of an empty trolley with a dribble of blood near a drip which had been pulled out. Sam let out a scream of rage and rounded on the nurse who was shouting her name.

"Sam! Please calm down-"

"Where did the man in this bed go?" Sam demanded.

"What? I-I don't know! He should still be there..." The nurse said as she frowned in confusion.

"Well congratulations!" Sam said while clapping loudly, "You just let the real cause of the explosion get away! Well done!"

"Sam I think you're confused," Another nurse said gently as she held up her hands like she was trying to calm a spooked animal, "The man who blew up Holby City Hospital is downstairs, his name is Mark James and the police have him in their custody."

"No," Sam said in a voice which made the nurse back away several steps, "I think you're a little confused. Mark James was trying to save Holby City but we got there too late! It was the man lying in this bed that created that chemical bomb!"

Suddenly it hit her. If Mark James was downstairs and was taking the wrap for something he hadn't done, this man was more than likely hoping it would stay that way so he could get away. Mark was in danger.

"Where is Mark now?" Sam shouted.

"Sam I think you better sit down while we call psyche." The nurse replied, offering her a seat.

"You all think I'm crazy? Wonderful." Sam said sarcastically as she rolled her eyes.

"Sam there is no way any of this is true... Mark James is the criminal, it's all over now!"

"I am going to say this once and once only. Mark James was a lab technician at Holby and the man who has supposedly lost his memory and was lying here is his boss. A couple of months ago Mark feared his boss had some kind of drug addiction and so asked me to talk to him, and when I went into his office I found him smoking cannabis and there was a line of something else on the table. After having a long conversation and persuading him to get rid of the drugs I thought I had gotten through to him but it turned out he was just playing me. Mark came to me a couple of weeks later and told me that he hadn't quit and he had discovered that the reason he was taking the drugs was because he wife and two kids had died in Holby ED. When I went to talk to him about bereavement counselling I got a glimpse of some kind of schematic on the table that looked a machine he was building. This time he told me to get out and wouldn't listen to me or Mark. I told mark to keep an eye on him and a day later Mark told me he got a look at the schematic and it was actually on how to build some kind of bomb which would be set off by a chemical that reacts with air and ignites. We both ran down there and tried to find him but he must have been long gone by that point along with the schematic and however far he had gotten with making the bomb. Luckily mark had copied down the formula of the chemical and we attempted to make another chemical that would neutralize the one he had made. Problem was he had already set the bombs, as apparently he had made a load of them, in recess and wasted no time gloating about how we had failed to stop him, so we ran there and Mark was about half way through applying the chemical to the first when we realized there was no way to stop them going off in time because the reactions had already started so we decided to run and Mark yelled at anyone nearby to do the same." Sam took a deep breath after finishing and stared around at the dumbstruck faces. "So will you please tell me where he is before his crazy boss gets to him?"

"AAU" Said one of the nurses shyly.

Sam nodded thanks and started to run again, pushing past doctors and patients alike. Even though the remembered the majority of what had happened there was still something troubling her. Mark had said we have to sort out the other hospitals. Did that mean more bombs?

When Sam finally reached the ward she looked around for a few seconds before noticing the police guarding the door to the private room. Luckily for her they were too busy walking to a nearby nurse to notice her slip in.

Sam approached Mark slowly, confused by the terrified expression plastered on his face. As soon as she reached the bedside she was about to say something to calm him down but found her voice cut off by a large scalpel being pressed into her windpipe.

"That's far enough Dr Nicholls…"

…

*More dramatic music*

Sorry about the massive block of text…