Elizabeth has President Dalton's support when attempting to make history by lifting the Cuban trade embargo. However, she faces a challenge in winning the Senate's support. Meanwhile, Henry and Alison bond while touring Havana together.moreless
When an NYPD officer is murdered, Holmes and Watson join the investigation. Sherlock looks for the person posting his personal statements made in sobriety meetings on a "recovery blog".
A drug-deprived Thackery fears that a prominent inventor-surgeon will overshadow his accomplishments at the upcoming New York Surgical Society event. Meanwhile, Bertie courts Lucy as he fends off his father's demands that he leave the Knick; and staff members go to court to keep Typhoid Mary in quarantine.moreless
A surprise visit from Sherlock's brother Mycroft leads to discord between Holmes and Watson. Meanwhile, Sherlock and Joan investigate a missing person's case that takes them into the world of unmanned aeronautics.
Mycroft shows up in New York to ask Holmes and Watson to solve a case concerning his former fiancée. Mycroft and Joan's relationship is a source of contention with Sherlock.
When a young man is killed as he enters his apartment, Sherlock is called upon to consult. Watson will have to deal with Sherlock's reaction when she gets together with her ex-boyfriend.