The chilly, misty night air blew into the TARDIS as the Doctor threw open the doors and stepped out into it. On his shoulder, four and a half inch tall Zepheera hugged herself tightly against the cold, holding in her fleeting body heat.
“So the Ponds are in a cruise-starship crashing toward this planet, and we are on a roof why, exactly?” she griped through gritted teeth in attempt to keep them from chattering.
“There’s something controlling these clouds, preventing that ship from landing. I’d say it was that there,” the Doctor explained, treading carefully across the snowy tile along the rooftop. He pointed up at a large dome further on, connected to a spire shooting a brilliant magenta light into the clouds. “Something on that scale’s gotta have a control hub of some kind, and that’s what the TARDIS was tracking. It’s gotta be around here somewhere.”
Zepheera nestled in closer to the Doctor’s neck to keep warm, glancing around and behind him for an escape ladder or staircase. “We’ve gotta get down from here, first,” she murmured.
As she said this, something caught the Time Lord’s eye. His grin went unseen by the borrower and she was used to him randomly picking up speed as he walked, just as he was doing now.
“Gotta get down and get inside,” he corrected as he approached the smoking chimney stack and braced his hands against the brim. “I say we kill two birds with one stone.”
The Doctor’s sudden stop jostled Zepheera enough to catch her attention, and she turned to take in the chimney and let the Doctor’s plan sink in.
“Don’t you dare,” she warned, “ that is a terrible idea! You could get hurt and I could–Mmph!” Her protests were muffled by the Doctor’s hand scooping her up unexpectedly.
“Oh, c’mon Zepheera, it’s Christmas Eve!” he exulted, dropping her into the pocket on the outside of his coat, the one over his left heart. He cupped a hand gently over it to hold his precious passenger in place. “Hold on tight and have a little holiday spiri-i-i-it!”
With that, he went tumbling down the chimney.