I've just read the most brilliant fic.
Are you a Battlestar Galactica fan? Are you a Kara/Lee shipper? Were you horrified by the series finale and outraged and appalled by what they did to the character of Kara Thrace?
Have you seen Inception?
The Irreplaceability of Things Lost is an amazing piece of writing that combines the two worlds in the most clever and satisfying way possible. Admiral Adama hires Dom Cobb to pull Lee and Kara out of the dream in which they have both become trapped, a dream in which the worlds ended and they're on the run from the cyclons while trying to find Earth.
Are you hooked yet? Then how about if I tell you that this fic explains all the inconsistencies BSG ever had, particularly those in season 4? How about if I tell you this is the one fic you have to read after you've watched the entire series? (Though you do have to read it only AFTER youv'e watched the entire series, because it has spoilers for absolutely everything. Please be aware of that.) How about if I tell you it's a lovely long, plotty, emotional, believable, plausible story?
Okay, now that I've got your attention, run as fast as you can to read this story. I guarantee you you won't be disappointed.