An interview with a federal law enforcement agency forces Beckett to reconsider her career and her relationship with Castle; a young woman's body is found inside a flop house's water tank.
When a government whistleblower is murdered, Beckett and Castle must figure out who is responsible and determine why Homeland Security is trying to take over the case.
When Beckett steps on a pressure-sensitive bomb, the team searches for a way to save her while Castle distracts her by talking about their relationship.
When Beckett is tasked with protecting a charming billionaire whose life is in danger, she reflects on her relationship with Castle; consumed with jealousy, Castle tries to solve the case as quickly as possible.
Castle learns his daughter's kidnapping may be part of a larger agenda.
By popular request, here is the never before seen scene from 'Boom!'
Castle decides he wants more.
Castle asks what that says about their relationship.
An incredible, life-altering opportunity is put on the table.
It's the beautiful final moment for Caskett.
Lanie and Esposito kiss.