The Unsolved Murder of Beverly Lynn Smith (2022)

S5E16 Fidelity (2)

Joan and Kitty set out to demonstrate that a series of murders linked to an old case solved by Sherlock and Kitty in London is part of a broader international government conspiracy, with the Defense Intelligence Agency playing a crucial role. Meanwhile, the dynamic between Sherlock and Kitty becomes tense when she reveals some life-altering news.