The Doctor danced around the control panel, Scarlett helping him punch in coordinates for their next adventure.
"Where are we going today Dad?" Scarlett asked.
"We're visiting some old friends." The Doctor explained. "Sherlock and John Watson-Holmes and their daughter Clara. You'd like her Scarlett, she's not much older than you." They continued flipping switches as the TADRIS took off.
They landed shakily in front of Baker Street as River Amy and Rory walked into the room.
"Where are we?" Rory asked.
"Baker Street. Home of Sherlock John and Clara Watson-Holmes." The Doctor said.
"The Sherlock Holmes?" Amy asked. "As in 'Worlds only Consulting Detective' Sherlock Holmes?"
"The very same!"
"What are we doing here?" River asked.
"They got a special case they don't quite understand. Thought it would be right up my ally." The Doctor hit a few more buttons and the hum of the TARDIS silenced. "Shall we?" The doors opened, revealing the large building that was home to the Watson-Holmes's. Scarlett stepped out of the TARDIS into the chilly evening air. The Doctor rang the door bell and rocked on his feet waiting for the door to open.
"Doctor." Clara said, opening the door. "Nice to see you got the call. I see you've brought friends. Come in."
"Nice to see you again Clara." The Doctor chirped, following her up the stairs. Amy, Rory, River and Scarlett in tow. "So what's this case your parents need my help with?"
"Ask them yourself." Clara responded, opening the door to the flat.
"Hello Doctor. River." John welcomed. "Glad you could come."
"Hello John." River said.
"Who are your friends?"
"Oh!" The Doctor exclaimed. "These are River's parents Amy and Rory, and this is mine and River's daughter Scarlett. We were traveling when I got the call."
"Well it's nice to meet you all."
"So, John, what's this case you and Sherlock need me for?"
"A young girl showed up a few hours ago." Sherlock began, stepping into the room. "She said her and her friend were attacked a few days ago by three men. One who called himself the Master. I believe you know him?"
"Yes I know him. I thought he was dead."
"You thought wrong Doctor. He's very much alive. And working with Moriarty, and, now this is interesting, Lucifer."
"Lucifer? Could you be talking about a Winchester?" Amy asked.
"The name did come up. How do you know the Winchesters?"
"They saved our lives once." Rory said. "Amy and I were on holiday in America and were attacked by a poltergeist. Sam, Dean, Castiel and Grace saved us."
"When did this happen?" The Doctor asked.
"It was before you showed up again." Amy said.
"The point is," Sherlock interjected. "This is as much you're fight as it is ours. I have reason to believe Moriarty, the Master, and Lucifer are plotting something against you me and the Winchesters. That's why she came here. They mentioned the both of us."
"What do we do?" River asked.
"Simple." The Doctor replied. "We go to America."