Rising tension between Sherlock and Watson bring their partnership to a crossroads, but they endeavor to put their differences aside while they help Sherlock's brother, Mycroft, who faces accusations of treason and murder. Rhys Ifans returns as Mycroft Holmes.
Episode rating
Cast of episode
87
12
- Sherlock Holmes
- Dr. Joan Watson
- Detective Marcus Bell
- Captain Thomas Gregson
- Mycroft Holmes
- Tim Sherrington
- Sir James Walter
- Julian Afkhami