The Unsolved Murder of Beverly Lynn Smith (2022)

S4E8 A Burden of Blood

Holmes and Watson delve into a murder case where the victim's death bears a striking resemblance to the methods of a notorious serial killer who is currently behind bars. Meanwhile, Sherlock and Joan take on the role of tutors for Detective Bell, helping him prepare for a police sergeant's examination that could secure him a promotion and a transfer to a different precinct.