"Take them. Show them when you're asked," the Doctor instructed as he gave John and Sherlock two ID holders. "Trust me, you'll need them."

He led them through the military facility, Clara following behind. Sherlock looked around, seeing things that never existed where he and John were from. John glanced at the posters, reading them. They were in London but something about it was different. Before he could form an idea they met with a man who had a stern look on his face. "Doctor," he looked at the Doctor. The Doctor bowed his head. The man then looked at John and Sherlock, "Who are you?"

They opened their ID holders for him to see, "Right then, welcome to UNIT, Mr. Benedict and Mr. Martin."

John and Sherlock looked at each other, bemused. Clara whispered to them that it would be best if they went along with it, reminding them both their fake names. John was Martin and Sherlock was Benedict. They should answer to those names for the rest of their time in UNIT. "Have you found him, Doctor?" Colonel Bradley asked the Doctor as he led them through UNIT. The Doctor nodded, "Aye, the locals have been fawning over him."

"He killed anyone, yet?" Bradley asked him. The Doctor shook his head, "He hasn't."

"Ah, you caught him in time," Bradley grimaced. The Doctor then said to him, "I need your help, Colonel Bradley."

"Of course, Doctor, we are in debt to you," Bradley nodded. "I need some sort of way to crack his programming," the Doctor explained. Bradley nodded, "Of course, Doctor, have the boys in the lab help."

John looked at Clara, "What's going on?"

"We can't deduce what he's programmed to do," Clara gave a look to the Doctor led by Bradley toward the lab area. Sherlock glanced around the area, "What is UNIT?"

"Let's just say they were a bane of the Doctor's existence at some point. But somehow down the line they became best of friends. Think you two, but without the politics," Clara summed. Sherlock caught a look by John. "If only that explained it," John sighed. A woman came up to the three with a look on her face, "Ma'am they're ready for you."

"Okay, thank you. Um, these gentlemen are my assistances; would it be alright if they came along?" Clara pointed at John and Sherlock. The woman looked at them. "I'm Martin," John smiled. Sherlock gave a small nod, "Benedict."

Lieutenant Moya, led the three through the heavy corridors, guarded by two soldiers. It was a large room, with rows of computers helmed by men and women. Moya took them to the farthest part of the room where two technicians showed them a computer. On the screen was camera footage taken from a helmet from a patrolman in the SoHo area of London. When given the go-ahead from Moya, the technicians played the footage.

A song played faintly in the background. The patrolman had been listening to music for the past hour to pass the time. The song switched to an ad, indicating he had been listening to the radio during his patrol. The patrolman was coming up the side of a market where he stopped and looked around. He pressed a button and the radio stopped. "Hello?" he called out. He continued to check around, when he found nothing; he resumed the radio and continued to patrol. He went through an alley known to some undesirables. He was coming out of the exit when he noticed a raven perched on a streetlight. Its amber eyes glowing like two orbs. The patrolman gave a laugh, asking the raven if it seen anything out of the ordinary. He was going toward another alley when he saw another raven perched on a sign hanging above a storefront. It cawed at him, and the caw was a gurgled mechanic noise. It was nothing like anything John or Sherlock ever heard before. Unsettled, the Patrolman proceeded to enter the alley. He held his flashlight low to the ground. "Patrolman Alice to base, I haven't seen anything, over?"

"Confirmed, Patrolman Alice, Base is requesting you do a roundabout and return, confirm?" replied a man on the walkie talkie. Patrolman Alice responded, "Confirmed."

He continued through the alley until he reached the end. Ravens perched along the side of the buildings, looking down at the patrolman. As Patrolman Alice looked at them, a song played on the radio, "He's the man behind the mask and he's out of control."

Patrolman Alice held the walkie talkie to his mouth, "Patrolman Alice to Base."

"Base reporting, what's your status?" the man asked. "Base, there is an unusual presence of ravens. The damnedest thing is they all have amber eyes, over?"

"Ravens don't have amber eyes," the man reasoned. Patrolman Alice shook his head, "They do! And they're looking at me, over?"

"You are the only one out in the SoHo area," the man continued to reason. Patrolman Alice gave a look to the ravens and they in turn looked at him. "Um, requesting to end patrol, over?"

"Hold on," the man disappeared, radio silence. Patrolman Alice looked at the ravens that followed his move as he walked. He tried to hum along to the song, attempting to calm himself. He almost jumped when the man came over the walkie talkie. The man said, "Accepted, return to base effective immediately, Patrolman Alice."

"Confirmed, Base, Patrolman Alice, out," Patrolman Alice sighed and turned back. He was almost to the entrance of the alley when he heard a noise. He turned around and saw someone standing at the end of the alley. Patrolman Alice raised his flashlight revealing a tall man that dwarfed Patrolman Alice. The tall man must've been 2.4 meters (8'0") and lo and behold he was none another than the Plague Doctor. The light from the patrolman's flashlight reached the eyes and remained dilated. "Halt!" Patrolman Alice said to the Plague Doctor. "Don't move!"

The patrolman edged near him and he didn't move. "Identify yourself!"

"Identify yourself!" Patrolman Alice began to shout at the Plague Doctor. But for naught, the Plague Doctor didn't respond, nor moved from his spot. When the patrolman tried to contact Base, the walkie talkie was dead. He panicked as he tried to work the walkie talkie with one hand. He stared as the Plague Doctor lowered his hulking head to look at him. The flashlight moved to capture the bronze mask and the eyes. The eyes flickered from pure silver to red orbs of light. The patrolman screamed and turned, running. On his radio that suddenly blared, him accidentally hitting the volume button that turned it up. The song continued, "Oh, if you see him coming, get away from him if you can. Just keep on running, run as fast as you can. He's a dangerous, dangerous, man. And he's out tonight. And he's watching you. And he knows your house."

The patrolman continued to run, his arms flaying. He screamed aloud for someone to help him as he ran through the alleys he patrolled. He dropped his walkie talkie that begun to shrill incoherently as he ran past some establishments. Running into a stall, Patrolman Alice fell onto the ground, fruit spilling over the road. He glimpsed to ravens concentrating on the sides of the buildings, all looking down at him. Patrolman Alice sprung up and continued to run through the empty street. The patrolman struggled to turn the volume down as he ran. He hoped to run back to the van stationed at the beginning of the SoHo area just before he began his nightly patrol. As he ran he looked up to see ravens flying overhead. Just as he was middle of the last alley before the van, he tripped and fell onto the ground. The camera temporary obscured by the ground as Patrolman Alice groaned. As he raised his head, the camera continuing to roll, there before him were a pair heavyset boots. Patrolman Alice looked up, the camera slowing moving up. Frame by frame, until it stopped at the Plague Doctor whose eyes burned red as he stared down at the patrolman. The flashlight was on the Plague Doctor as it rolled to his feet. His foot moved as it stepped on the flashlight, shattering the glass and flattening it with no effort. As Patrolman Alice stared, his radio turned up max volume. The last of the song played with a mechanic gurgle, "And he's after your soul."

The camera feed stopped there with a deafening shrill, then silence. Moya explained that they found him hours later, what remained of him, anyway. "Did you ever find out why it attacked him?" John asked her. Moya shook her head, "No. It was completely random."

"Unless," Sherlock interrupted them both. "It had to do with the flashlight."