The Doctor got a phone call she wasn't expecting from her old friends, Sherlock and John. The message that they left in her voicemail was panicked, and the Doctor began to worry as soon as it started to play.

"Hello, Doctor. It's John Watson. Sherlock and I are in trouble- [static]- London right now so we'd really like some assistance! We're at 221B right now, and we just heard that Moriarty [static] HELP!"

"On my way," the Doctor replied by text. She set the location to Baker Street and pulled the lever, but the TARDIS sputtered and with a bang, shook and cemented itself. The Doctor frowned, unsure of where she was (as she had just been in space, but she wasn't moving). She opened the door, looking out. She could see the Milky Way from a distance, with it's little galaxies containing small planets. She had to get there.

"Hey Doc." A voice said. The Doctor spun around to see a blond man in a leather jacket. "You're the right Doctor, right? Enemy of the Daleks?"

"What- how-" The Doctor said, staring at the being who had somehow gotten into her TARDIS in outer space. "How did you get into my TARDIS?"

"Me? I'm a celestial being. If you don't have warding, I can get in." He said. "You're British then? I hate British people. Why are you British if you're from space?"

"Nobody is from space." The Doctor said. "Where are you from?"

"Nowhere."

"Why are you here?"

"I did a trade with Moriarty and the Daleks. We wanted to see if we could beat each other's heroes. Plus, I'm getting paid and I need money to feed my kid when I get custody, so…"

"Moriarty and the Daleks?" The Doctor asked.

"The Daleks are taking down Baker whatever and Moriarty is trying to beat my boys, but i doubt he will. It'll be fun to find out whether or not he survives, though. And I'm taking care of you. So… I heard that you glow all gold and turn into another person when you're killed, right? Well, I'm going to make sure you can't do that."

"Did they tell you that I am thousands of years old?"

"Did I tell you that I'm older than you?" Lucifer snarked. "And impossible to kill, but it turns out that you're allergic to aspirin, right? And a tiny fall from a certain height or if your intestines were ripped out, could kill you easily. This isn't even fair, so I'll give you a head start. Go on, run along."

The Doctor stared at him, then turned and sprinted down the hallways of the TARDIS, into one of the bedrooms and locked the door. She backed up against the wall, and closed her eyes to think.

"MRS. HUDSON, UP THE STAIRS NOW!" Sherlock yelled. He grabbed Molly, and pulled her into the flat.

"Okay, so Irene, Mycroft, Eurus, Anderson, and Lestrade aren't here." John said. "What're we going to do?"

"My brother has a bunker, he'll be safe. Irene isn't in England right now, and Lestrade- Lestrade is in danger but there is nothing we can do. Eurus should be safe and Anderson can die if he wants to because he lowers everyone's self esteem. We've barricaded the door, we've activated Earthquake sirens. What else- what else-"

"We've got to find out if these robots have a weakness." Molly said.

"EXACTLY!" Sherlock yelled. "John- Where is John?"

"He said something about Rosie, Sherlock!" Mrs. Hudson said. "He went downstairs."

"We forgot that Rosie was in daycare." Sherlock closed his eyes, rubbing his hands against his face. "John probably went there to get her."

"Sherlock…" Mrs. Hudson said, looking at her phone.

"Mrs. Hudson, now is not a time for games."

"Sherlock, Moriarty just showed up in America."