Castle blasts off to ""The Final Frontier" on Monday's new episode.
Look for our favorite duo to attend a sci-fi convention on the installment, which is clearly an exciting world for Castle to enter. And for Beckett? The detective is clearly hiding her knowledge in this clip from the hour:
The investigation will take the tandem to a weapons expert. Well, a fake weapons expert, someone who has a double-bladed light saber. Yes! Watch this sneak peek now:
And Kate will only be able to keep her secret allegiance to a certain cult program quiet for so long. It all comes pouring out, hilariously, in this scene:
Finally, Castle and Beckett will interrogate the star of Nebula-9. He's rather intense, and a tad delusional, but altogether hysterical: