12. A View with a Room

Complete story — includes the ending

A colleague of Gregson's wants some help infiltrating the headquarters of a drug-dealing biker gang. Undercover cop Ryan Dunning believes that the gang leader stores everything about the gang's operations on a computer in his office. Sherlock plans the heist, but the inside man dies before they can carry it out. The man's body camera records the moment of his death; he apparently grew impatient and tried to steal the computer by himself, but was discovered and shot. However, there are discrepancies between the recording and the real office; the video was faked at a different location. The man and his partner wanted to incite a police raid on the gang, but his partner doublecrossed him. When the police search the headquarters, the computer is sent to officer Lisa Hagen to crack the encryption. However, Hagen was actually Dunning's partner. She is interested in the gang's offshore bank accounts. She siphons off millions, but is caught. Meanwhile, Joan assists Fiona Helbron, who helped the duo on a recent case and wants to ensure that her new boss is not a criminal. Sherlock is interested in Fiona romantically. Fiona likes Sherlock and initiates a relationship.