This report covers , the second episode of Sherlock Series 3, which centers on the wedding of John Watson and Mary Morstan. Streaming Status (April 2026)
: Currently available to stream for free with ads on KQED and Hoopla . Episode Content & Structure Sherlock review – Episode 2 Series 3: 'The Sign of Three' Sherlock_in_streaming_s03e02
: Available for purchase or through specialized channels like PBS Masterpiece or BritBox . AMC+ : Streaming for subscribers. This report covers , the second episode of