Story: A Shift in Perspective
Word Count: 50234
Author's Summary: The Tenth Doctor goes missing and it's up to Martha Jones to track him down again, but it proves both harder and more instructive than she expects.
Characters/Pairings: Sarah Jane Smith, The Doctor (All incarnations), The White Guardian, Torchwood, a plethora of companions
Warnings: Spoilers for just about everything. They are warned for in the author's notes of each section.
Recced because: Set a few months after series 4, "A Shift in Perspective" sends Martha on a journey that has her meeting the Doctor - yes, every incarnation of him. What stands out about this particular fic (and Persiflage's writing in general) is her nuanced and strong portrayal of Martha Jones: she's independent, she's strong, and she does what she has to do. Part of the charm of "A Shift in Perspective" is the fact that you get to see glimpses of Martha interacting with all of the Doctors (who are all impeccably characterized) as well as many of the previous companions. Moreover, the fic is fast-paced and features a solid plot alongside the solid characterizations. Overall, a wonderful fic to park yourself and read on a summer day (or on any day, really).
"Jack's wrist computer needs to be fine tuned by each incarnation of you so that I only meet each one of you once," she said, explaining that she'd met his third incarnation twice before he'd realised that the device needed to be recalibrated.
"So if you could just do the necessary jiggery-pokery with your sonic screwdriver, I can continue my search for my Doctor," Martha finished.
"Ah." He gave her a regretful look.
"Ah what?" she asked worriedly.
"I don't have a sonic screwdriver."
She raised her eyebrows, puzzled by this revelation. "Of course you do. Your third incarnation had one, so did your ninth, whom I just met." Then her frown disappeared. "Oh! Wait, are you the first incarnation, and you haven't built one yet? Did I just cause a paradox?"
He shook his head. "No, you haven't caused a paradox. And no, I'm not in my first incarnation. This is actually my fifth body. I did have a sonic screwdriver, but it was destroyed recently by a Terileptil, one of a race of space-faring aliens with very advanced technology, and I haven't had a chance to build a new one so far."