Dr. John Watson (Martin Freeman, The Office UK) is back in modern-day London after serving in the war in Afghanistan. His therapist, convinced that Watson is plagued by violent memories, urges him to express himself in a blog. But nothing much ever happens to Watson, and it’s not that he’s haunted by the war — he longs for it. Enter an eccentric roommate — one Sherlock Holmes (Benedict Cumberbatch, The Last Enemy). He plays the violin when he’s thinking, sometimes doesn’t talk for days, and has a dubious career as a self-described consulting detective. When what appear to be serial suicide cases surface in London, a desperate Detective Inspector Lestrade (Rupert Graves, The Forsyte Saga) reluctantly consults the freakish Sherlock. To Sherlock, a crime spree is like Christmas — only made better by the possibility that these crimes may be the work of a devious serial killer. The game is on, and before it is over, Sherlock will put his life on the line — all to keep from being bored to death. Sherlock is based on Sir Arthur Conan Doyle’s Sherlock Holmes and is co-created by Doctor Who producers Steven Moffat and Mark Gatiss. (One episode; 90 minutes, TV-PG)