Season: Seven — Episode: 7 Director: Michael Hekmat — Writer: Sean Bennett — Aired: July 4, 2019 — Viewers (millions): Summary: Holmes and Watson investigate the murder of a criminal who made his living by stealing from other criminals. Also, when Captain Gregson resumes leadership of the precinct, he suspects his interim replacement, Captain Dwyer, is responsible for one of his best detective's suspicious departure.
In the bullpen at the 11th Precinct, Captain Dwyer welcomes Captain Gregson back to duty in front of his command. In Gregson's office, Detective Bree Novacek tells Gregson that she's leaving the NYPD. Gregson is concerned given Novacek's excellent record and that she's close to her retiring. Ridley Dineen returns to his apartment with a bag full of cash and calls his girlfriend Janice over to celebrate. Janice arrives and finds a trail of cash leading to Ridley's bedroom. She finds him dead, laying half-naked in bed on top of many bills. At the Morgue while viewing Dineen's body, Detective Bell tells Holmes and Watson that Dineen robbed other criminals. Dr. Hawes notes Dineen died of an overdose, which he believes was fentanyl. Bell and Holmes argue whether Dineen was poisoned by touching fentanyl-laced cash while Bell reports that blood was found on Dineen's gun.
We had one made special just for you.
At the precinct, Janice tells Gregson and Watson that Dineen was given a tip about the cash being in a stash house, but doesn't know who gave it to him. She also says Dineen never used drugs. Bell and Holmes find nothing at Dineen's apartment but Holmes notices cat hair everywhere yet no signs of a cat. At the precinct, Watson reports to Gregson that no one turned up at any hospital with a gun wound from Dineen's weapon. Gregson tells her about Novacek leaving and asks Watson about Dwyer's conduct. Noting that Dwyer was on probation for a past sexual harassment complaint, Watson suggests Gregson confront Dwyer if he harassed Novacek. At The Brownstone, Watson brings Holmes a toxicology report on Dineen which confirms he died from a fentanyl overdose. Noting that the blood on Dineen's weapon wasn't identified, Holmes sees from the report that Dineen used an inhaler for cat allergies and heads back to Dineen's apartment.
He had a tip. Said it was from an old friend.
Meeting Bell, Holmes finds that the inhaler in Dineen's bathroom has an aerosolized fentanyl cartridge inside and concludes that Dineen was murdered. After analysis of the cartridge, Bell and Watson tell Gregson that Holmes recognized the chemical inside it as Kolokol-1, used by the Russian government in 2002 on Chechen rebels during a theater hostage taking. Believing Dineen may have been a Russian spy, Holmes heads to a school to speak to a past acquaintance, Olga Berezhnaya. A Russian spy, Olga once used being a stripper as her cover but has switched to being a first grade teacher. Informing Olga of Dineen's death by Kolokol-1, she doesn't know if he was a spy. In exchange for not exposing her, Olga agrees to find out who used the chemical on Dineen.
I know your teacher is an excellent dancer.
Surprising Dwyer at a bar, Gregson asks him about Novacek while indicating that she never implicated Dwyer. Dwyer is furious and while not admitting to any misconduct, believes Gregson should be thankful for the work he did at the 11th. Bell calls Gregson that he's found the man Dineen shot, Cecil Troy. At the Morgue, Bell reports that Troy was found dead at his home and was an art restorer. No cash nor drugs were found at his home. At Troy-Kensit Labs, Bell, Holmes and Watson question Audrey Kensit who is shocked to learn of Troy's murder. She explains their lab developed a solvent which cleans antique art without damaging it. Holmes finds a burner phone in Troy's desk with texts messages revealing an address and a set of numbers. At the address, they find a robbed safe, Dineen's footprints and realize that Troy was the person who tipped Dineen off as to the fentanyl-laced cash.
At the Brownstone, Watson tells Holmes that Troy owned the property he sent Dineen to while Holmes has found Troy and Dineen were childhood friends. Puzzled why Dineen killed Troy and why Dineen was then killed with Kolokol-1, Holmes leaves to meet Olga. At a restaurant, Olga has a dossier and tells Holmes that Dineen wasn't a spy. Pointing to a window in a building across the street, Olga says that one of the scientists who developed Kolokol-1, Pasha Voynov, lives there. Having left Russia without the government's permission, Russian intelligence monitored him. Confirming he bought supplies in NYC to make Kolokol-1 but not knowing why, Olga says Voynov is a threat and that Russia can't have him sharing his knowledge with the US. Moving her kerchief, Voynov's apartment explodes.