(It's fine. Been there.)

~NEXT DAY~

The TARDIS materialized in a different alley. The Doctor stepped out of it with her sonic screwdriver out. She turned it on and the buzzing noise filled the air as she scanned around before looking at the readings. "So, it's coming from...." She whispered under her breath as she began following the signal to a neighborhood house. She stood on the doorstep with a confused look. The signal was coming from here? She tried to peek in any windows but couldn't see anything. 

She then decided to look through the cat flap hoping to see something.