I don't claim to be an expert in procedure or jurisdiction or anything like that, but I do pay attention to a show's continuity, and they established in a season 1 episode that kidnappings are FBI territory, causing Beckett to question why she's being called in on one. When this case turns into a kidnapping investigation, the FBI is never even mentioned. I kept expecting a liaison to come in, or at least a mention that they'd been called and were being kept up to speed, but no. No one even bothers to mention that the NYPD homicide division is working a kidnapping case.
Despite that, the episode is really good. I like most of the twists and clues they follow. I wouldn't have much to criticize if they'd at least bothered to mention the FBI.
Though there is a silly scene at the end where Castle sticks his phone under the crack in a door and gets a perfect picture of the room. Even on shows with magic forensic technology, that's stretching it. I don't know what a mass spectrometer can do, but I know exactly what an iPhone camera can do, and it really took me out of the story for a few seconds.
Despite that, the episode is really good. I like most of the twists and clues they follow. I wouldn't have much to criticize if they'd at least bothered to mention the FBI.
Though there is a silly scene at the end where Castle sticks his phone under the crack in a door and gets a perfect picture of the room. Even on shows with magic forensic technology, that's stretching it. I don't know what a mass spectrometer can do, but I know exactly what an iPhone camera can do, and it really took me out of the story for a few seconds.