27K views · 539 reactions | Sherlock Holmes has been portrayed well over 250 times in film and TV – more than any other literary human character. Why is the pipe-smoking detective so iconic, and what does his enduring popularity tell us about the stories and characters we love the most? Find out more at cnn.com/cnnfilmschool | CNN International | Facebook

"It is very unexpected. And funny, and tragic and beautiful." The #Sherlock cast describe series four... | BBC One