The show is a modern adaptation of Sir Arthur Conan Doyle. Sherlock Holmes in modern society. It's fun for a book enthusiast to see the contrast between the book and the show. Benedict Cumberbatch as the leading protagonist is an absolute delight and Martin Freeman as Watson is a delight the two compliment each other on the screen and are fun to watch. The show reached its peek in Season 2 Finale when Sherlock tricks Moriarty and the entire audience. But from there the performance has only declined and according to me the season finale of the fourth season was just rock bottom. It is still a good show and worth your time.