One mysterious case in particular baffles Scotland Yard - but Sherlock is more interested in a seemingly-trivial detail. Why is someone destroying images of the late Prime Minister Margaret Thatcher? Is there a madman on the loose? Or is there a much darker purpose at work? Something with its roots deep in Mary Watson's past.

Sherlock Season 4 Episodes...

Sherlock Show Summary

Based on the books by Sir Arthur Conan Doyle, this updated version of the Sherlock Holmes stories is modern, edgy, and dangerous. Set in present day London, Holmes is as brilliant and arrogant as ever. His loyal friend Watson served in the Afghanistan war as an army doctor. Together, they embark on thrilling, funny, and outrageous adventures.