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 and Beckett are ambushed, forcing them to take a witness on the run.
A documentary crew follows Castle, Beckett and the team.
Castle's weekend plans with Beckett are disrupted.
Castle tries to protect Beckett as she pursues the man who shot her.
A detective from Scotland Yard teams up with Castle and Beckett.
Castle and Beckett investigate the death of a dance show contestant.
Beckett and Castle must stop a series of events.
Beckett and Castle investigate a weather caster's death.
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.