- The Greatest Loss, set right after The War Games, is pretty heartrending.
- Especially since poor Jamie is completely alone, can't remember why he didn't go with Kirsty and her father, and remembers just enough of the Doctor to realize he's missing someone very important. And nothing else...
- Keep and Share might be up there with the most tragic fanfiction ever written. The author herself says on her masterlist page that it isn't even part of her proper Doctor Who fanfiction timeline because it's so sad.
Tear Jerker / Rose Of Pollux