S4 E1 - The Six Thatchers
S4 E2 - The Lying Detective
S4 E3 - The Final Problem
Videos: Trailers, Teasers, Featurettes
The fourth series begins with the nation’s favourite detective, the mercurial Sherlock Holmes, back once more on British soil, as Doctor Watson and his wife, Mary, prepare for their biggest ever challenge - becoming parents for the first time.
Streaming, rent, or buy Sherlock – Season 4:
Currently you are able to watch "Sherlock - Season 4" streaming on Amazon Prime Video.