The Reichenbach Fall is written by Steve Thompson, who wrote Series 1 episode The Blind Banker. Based on the Sir Arthur Conan Doyle story The Final Problem, this episode features the return of Sherlock’s nemesis Moriarty. Click through for a look at BBC’s trailer for the finale, set to haunting song “Sinnerman” by Nina Simone, as well as a new scene from the episode, courtesy of a recent talk show appearance by star Martin Freeman.
Word to the wise: if you don’t know the plot of The Final Problem or you’ve never heard of Reichenbach? Don’t google it.