Ryan has Beckett show him where she was standing when the first shot rang out. Castle notices that she was in close proximity to Vaughn. Very close proximity. The only reason the killer missed is because of the kiss. Beckett swears it didn’t mean anything, but Castle knows that Vaughn is still alive because Beckett didn’t push him away. As for the case, the team learns that Cindy was in contact with Thomas Barber. She didn’t know he was going to use the toxin she supplied to hurt anyone. The money she was paid was authorized by Eric Vaughn. Castle believes he orchestrated everything to kill Arthur Felder.
The theory is that Vaughn killed Felder to keep him from learning that he was investing millions into a fraud company. The billionaire denies this. Beckett learns that her kissing suspect is, indeed, innocent. His lawyer, David Anderson, is the one who lost tons of money using the fraud company. The attorney fesses up and Thomas Barber is caught trying to flee the country. Cased closed. As for Vaughn, he realizes that a future with Beckett is not in the cards. Castle is happy about this. He’s also taking Vaughn off his last supper list.
Martha believes that without a ring on her finger, Beckett can’t really be totally committed to a relationship. This bit of motherly wisdom along with everything that went down during the case has Castle taking action. He snips the cord on his video system as a symbolic gesture. He has a romantic evening in store for Beckett, who asks where they are going. Castle replies that they are going to the bedroom. By the look on Beckett’s face, that’s not the answer she was looking for.