Season two, episode three spoilers. Sherlock made a point of saying he was not angel on the rooftop. Some supposition about what that meant and how Sherlock planned for the fall. Dark!Sherlock. Complete.
Tom Riddle experiences an event at the orphanage that gives him his first taste of violence and fear of death. Rated R for attempted murder of a minor. Ficlet.
Harry is possessed by Voldemort, gaining the personality of Tom Riddle, who finds endless entertainment within the walls of Hogwarts. Dark Harry. Sort of TRGW.
Alternate Universe: What would the world be like if Harry Potter had never been "the boy who lived?" Harry is transported to a world in which Death Eaters control a tortured, impoverished wizard society. How will he get home and who will believe him?