Castle worked out that Ben Conrad was a scape-goat, shot by the real serial killer. He was too late to prevent Becket's place being bombed, but she survived, having being in the bath at the time. Shaw's profile and databases lead to a likely suspect, Doherty, actually deceased: the new fake identity. The team stakes his place, but the killer expected them. He gets away, but is identified. Becket is barricaded in castle's home, but the killer captures Shaw. Only Castle manages to think like him and prevent a big bang finale. Written by
Did You Know?
After shooting the suspect at the end of the episode, Beckett says "Good shot" to which Castle replies "I was aiming for his head." This is a direct quote from an episode of Firefly - 'Shindig' - which Fillion also starred in. See more
In Season 1 (Home is Where the Heart Stops), Castle and Beckett are at the shooting range, and he gets three shots in the 10-ring with ease; however, in this episode of Castle when he is aiming the gun at Dunn, he shoots him in the hand, but then says to Kate "I was aiming for his head." While Castle is shown to be an excellent pistol shot on the range, he is not a trained police officer or a skilled/experienced fighter. Therefore, it's entirely plausible that having to shoot under stress would severely affect his marksmanship. This happens even to trained police officers and soldiers. See more
Special Agent Jordan Shaw
Stay in the van. You're the target.
Now you know what it's like for me.
References Batman: The Movie
Written by 'Robert Duncan (VII)' (qv) See more