Plot hole: Brandt sabotages the mercenaries' explosives so they are killed when trying to escape. No real team of professionals would let the rich yahoo who hired them touch their gear. Nor would they use any explosives he provided without (at the bare minimum) inspecting them first. It's a plot hammer to wrap up what happened to the mercs so they can move on to Brandt's capture.
Suggested correction: So, they knew they would be framed/killed at the end? Also, if he was paying or threatening them, then why wouldn't they listen to him?
Walk up to a professional you have hired and is doing his job. Plumber, AC tech, whatever. Ask him if you can mess around with his stuff while he's working. What do you think he'll say? Especially if your messing with it could cause harm to him.
Continuity mistake: The paper dolls found at the crime scenes are mixed up. The 1st one found was from Wyatt's scene and called the "Persecution of Kings" which would lead them to King Street, the site of Wyatt's murder. This one should have been found by Sara Vazquez.
Continuity mistake: Jennifer Beals' blouse mysteriously changes from white to blue while they are in the CIA secret bunker prior to heading out for the final confrontation.
Continuity mistake: When Castle comes home to Sophia waiting for him in his office, she is holding the Derrick Storm graphic novel; it keeps changing from open, to closed, even to her closing it every time we see it in her hands. It's very noticeable.
Headhunters - S4-E21
Continuity mistake: During Shea's interrogation scene, he has blood running from his head down to his eyebrow which collects into a blob. Between shots, this blob of blood disappears and reappears.
