Recaps

Sitangna joined Sherlock and Watson in stopping Moriarty’s bomb plot and rescuing Emily from Victor, while building a place for herself at Baker Street. The arc left them celebrating Christmas with friends as Sitangna accepted Emily’s piano and welcomed Mycroft to the gathering.

• Sitangna arrived at 221B Baker Street as Sherlock and Watson investigated a bomber, and she helped Sherlock save the hostages in the bomb cases.
• Sitangna recognized Jim as Moriarty, then kicked him into the pool when he threatened Sherlock and Watson with a bomb vest and snipers.
• Mycroft brought Sherlock, Watson, and Sitangna into Emily Cavendish’s kidnapping case, and they traced her disappearance through a hidden passage and a series of puzzles.
• Sherlock located Emily in a clock tower, and Sitangna played Bach on the pipe organ to disable the bomb’s pressure sensor before Emily subdued Victor.
• Sitangna returned to Baker Street and spent time with Sherlock and Watson, while Victor’s reported suicide and the Cavendish family’s handling of the case raised her suspicions.
• Sitangna traveled to Cambridge for work, then returned to Baker Street for Christmas and shared stories about her childhood and her interest in piano.
• Emily brought Sitangna an unused piano as a Christmas gift, and Sitangna accepted it before welcoming Mycroft to the gathering.

Sherlock and Sitangna’s growing feelings were interrupted by the murders surrounding Victor Trevor and the Cavendish family, leading Moriarty to abduct Sitangna and Watson. Sherlock uncovered Eurus’s role in the childhood tragedy, rescued Watson from Musgrave Manor, and set out for Sherrinford to save Sitangna.

• Sitangna confronted Sherlock about the Christmas kiss, and Sherlock admitted his feelings for her and asked to study his emotional reactions.
• Sherlock, Watson, and Sitangna investigated Charlie Andrew’s death and discovered Victor’s body, while evidence suggested the real Victor had been replaced.
• The investigation led Sherlock and his companions to the Holmes family home, where Mycroft gave Sherlock an old notice about the disappearance near Musgrave Manor and Sherlock recognized the Redbeard case.
• Sherlock confronted Professor Ashton over Victor, but Moriarty’s agents attacked, captured Sitangna and Watson, and left Sherlock unconscious.
• Moriarty kept Sitangna in a laboratory, where he tested her and cut a skin sample, while Watson awoke trapped in a well.
• Sherlock learned that Victor had been hidden behind his memories of Redbeard and that Eurus was his forgotten sister, while Mycroft’s agents located Watson and Sitangna.
• Sherlock solved the pump truck’s code, allowing rescuers to free Watson from the bomb-rigged well, and Watson urged Sherlock to save Sitangna.