The slow evolution of Molly and Sherlock's relationship after the events of The Reichenbach Fall. Spoilers for Series 3.
When Jemma gets sucked into a parallel dimension, it's up to Fitz to get her back. The Jemma he finds, however, is not the Jemma he expected. Things get complicated. (AU based on the Doctor Who episode The Girl Who Waited)
When Fitz loses a bet with Mack, it ends up leading him back to the one person he thought he'd never see again. AU, set during a season 1 timeframe.
Jemma Simmons has never met anyone who hates Christmas as much as Leopold Fitz does-which makes the fact that he's taken on a job as a shopping mall Santa elf very, very strange. AU.