Sherlock Holmes is one of the classic characters of literature, and as such, has had his adventures turned into TV and movies, so people can share his adventures without all that pesky reading.
In fact, he’s suddenly so popular, that several franchises have taken advantage of Holmes being a public domain figure and produced alternate versions. There’s Steven Moffat and Mark Gatiss’ BBC TV version, Guy Ritchie’s films, and now a CBS TV series starring Jonny Lee Miller and Lucy Liu.
Yes, really, that is an actual thing.
Over at The Leaky Wiki, I’ve uncovered the long term plans for the character:
Every Actor in The World to Play Sherlock Holmes and Doctor Watson