Whether you liked the Doctor Who season finale or not, this alternate ep 3.13 written last week by lizbee rocks. Here is her synopsis and links to all five parts.
Title: How Martha Jones Saved the World and Lucy Saxon Initiated Divorce Proceedings With Extreme PrejudicePart 1
Characters: Martha, various and assorted ex-companions, UNIT, a couple of originals, the Master, the kitchen sink... Look, the alternative title was, "Fanwank: The musical!"
Spoilers: "Human Nature", "The Family of Blood", "Utopia", "The Sound of Drums", spec for "Last of the Time Lords", although if you believe me on this one ... you can't have my tin hat, that's all I'm saying. Oh, and tech swiped from "The Invasion".
Notes: I R SRS FAN. THIS R SRS FIC.