Sherlock was running down the street again. He had gotten a lead on an exciting case, and he needed to get to the police station as fast as he could. John ran behind him, feeling more excited than he had in ages. They turned a corner when something caught John's eye: a blue box, almost like a phone booth. John read the words 'Police Public Call Box' over the door, and moved to look at a sign posted on the door itself. The sign read: 'Police Telephone: Free for use of public; advice and assistance obtainable immediately; officer & cars respond to all calls; PULL TO OPEN'

"Sherlock?" John called. "Come here a moment."

Sherlock walked over to John and said, "John, I don't have time for trivia. What is it?"

John pointed to the box and said, "It's a police box, Sherlock. Why don't we try phoning the police?"

Sherlock shook his head and said, "Don't be ridiculous, John, that phone isn't connected to anything." He took a look at the box and said, "It's not even a real police box."

John looked at Sherlock and said, "How on earth could you possibly know that?"

"I'll explain later," Sherlock said. "We have places to go! People to see! Allons-y!" He turned around and began running again.

"Allons…what?" John asked, running behind Sherlock.

"I'll explain later!" Sherlock repeated, allowing a small grin appear on his face.

Back at the box, the door opened. Two people walked out, a man and a woman. The man was dressing wearing red trainers and a pinstripe suit, with a brown overcoat over it all. He grinned at the woman and said, "And you thought I wouldn't get you back, Rose."

Rose smirked in spite of herself and said, "I never said that." She noticed two people running down the sidewalk and said, "I wonder where they're off to in such a hurry?"

The Doctor looked over at the pair running away and said, "It looks like Sherlock has another lead."

"Excuse me?" Rose asked him. "Who's Sherlock?"

"He's just a friend," the Doctor said. He looked in the opposite direction and said, "I think I found what we're looking for, Rose."

"What is it?" Rose asked as the Doctor began to run off, following him.

"I'll explain later!" the Doctor said. "Allons-y!"