SHERLOCK S3E3: HIS LAST VOW TRAILER

What seems like a simple matter of recovering a set of stolen letters becomes one of the most dangerous situations Sherlock Holmes has ever encountered. The detective seeks to recover the incriminating correspondence from Charles August Magnussen, a slippery and poisonous media mogul and master blackmailer. Magnussen is one of the trickiest foes Holmes has ever faced, causing this seemingly innocuous case to unlock a series of shattering revelations that will test the one, only and last vow Sherlock