Provider: Eastern (ET) Change
Sherlock's brother, Mycroft, arrives in New York and asks Holmes and Watson to help him solve a case involving his former fiancée. Sherlock agrees to help but finds it difficult to accept Mycroft's close relationship with Joan.
Morland offers to use his influence to have Sherlock and Joan reinstated as consultants to the NYPD, but Sherlock questions his father's motive. Meanwhile, Watson helps the FBI investigate a triple homicide at a top secret research lab.
Joan investigates her first solo case when a wife disappears. The missing woman left behind a tear-filled video that mentions a murder on a subway platform. While Joan searches for the vanished lady, Sherlock probes the murder.