Beckett and Castle in “Disciple”

Beckett

There's not a shred of evidence that Tyson is alive, let alone involved in this.

Castle

Tyson doesn't leave evidence, not unless he wants us to find it. Like that deleted photo. No evidence, plus meticulous planning, that's vintage 3XK. And this case has it in spades.

Beckett

Castle-

Castle

And you wanna know some other 3XK classics? Using people that look like other people. Using a killer to act on his behalf. Beckett, how can you not see it?

Beckett

What I see is the guilt that you feel.

Castle

This isn't about me.

Beckett

Look, when Tyson escaped, he outsmarted all of us. But you've always blamed yourself.

Castle

[Nearly yelling] Because I'm to blame. [Calmer voice] It's him. It's Jerry Tyson.

Beckett

Don't chase ghosts, Castle, okay? It's not worth it, trust me.