It's been a while since we've had a brand-new episode of Sherlock, but the show's massive popularity has rarely dipped since it first aired all the way back in 2010.
Launching the mainstream career of Benedict Cumberbatch and sending him and co-star Martin Freeman blasting through the gates of Hollywood, the show was almost an overnight hit, lauded for its creative editing, snappy dialogue, strong performances, and modern reinvention of the Sherlock Holmes mythos.
It also managed to strike a chord with pop-culture lovers around the world, on a level that most shows can only dream of hitting. The Sherlock subreddit has over 100,000 subscribers and is still insanely active to this day, and the desire for a fifth season has only increased in the years since the complex, calculated detective's last outing.
Unfortunately though, it doesn't look like we'll be getting another series (or one-off special) in the near future, but since we may now have a complete era of Sherlock to look back on, it's the perfect time to assess your knowledge of the show as a whole.
Answers at the end!