Holmes has finished watching the videos, and he's moved on to something more interesting: the photographs on Terry's computer. They're generic pictures of her family, but each one is over a gigabyte. That seems like more than you'd need, unless she was planning on making enormous posters of them. Aha! Holmes reveals that it's steganography! Security through obscurity! Holmes is speaking the language of my soul. It basically means that the image files have a whole lot of extra information hidden in them. But then he has a nonsense piece of decryption software, which takes it back into the realm of fantasy. Holmes warns Watson that the hidden content is probably horrible and vile. It's actually just people talking in foreign languages. Russian, I think. He grabs the phone for Gregson. Back to the Purcell home!

The police roar up as Oliver Purcell is bringing the trash in. Holmes congratulates Mr. Purcell on being such a good spy. A spy, you say? Holmes explains that the escorts made the hotel popular among diplomats. Mr. Purcell wasn't fired from his job at a financial management company; he resigned when they signed a contract with the Department of Defense. Holmes says Oliver stepped outside to shake hands, and Terry left some coins out on the desk. Both of which are Russian traits, so they must be Russian spies. Oliver would like a lawyer.

Interrogation chamber. Gregson says the feds are on their way, because this case is bigger than the NYPD. The FBI will be handling the espionage, and they're lucky they're being allowed to sit in for the murder. Watson shows up and says she's been trying to contact Carly, who is seventeen and in crisis. Watson believes it's traumatic to find out your parents are Russian agents. Holmes thinks Carly might have been a spy herself. And spies have handlers!

Holmes barges into a room and announces, "I was wrong about you, Jeffrey!" He's talking to Jeffrey Silver, the guy from the land mine organization. There's a meeting going on, but Holmes interrupts it with the announcement that Jeffrey's a Russian Handler. He gave Oliver and Terry cover and information. And one of the steganography photos was on his laptop on Monday! I'll take Holmes's word for that, because I don't feel like rewinding to check. Jeffrey denies knowing who killed Terry, and he lets Holmes on his computer. The picture is no longer there. Jeffrey requests that they either arrest him or leave. Gregson calls to let them know that the interrogation of Oliver Purvell is starting, and that the feds have said that Holmes can sit in. Really? A spy case and they're going to let someone not from the US participate?