Spoilers

Welcome to world of reality TV, Castle. Be careful. It’s dangerous out there.

It’s a Firefly reunion! Adam Baldwin is set to guest star on an upcoming episode of Castle.

Castle enters the fairy tale world next Monday. Get your first look now at the episode “Once Upon a Crime.”

Lauralee Bell is on her way to Castle. The soap opera actress will mock Paula Abdul on March 19.

Jennifer Beals will make the first of two appearances on Castle next Monday night. Check out the first promo now for “Pandora.”

Prepare for an amazingly fun episode of Castle, fans. And do so here by watching six clips from “The Blue Butterfly.”

Look for Castle and Beckett to take a big step this Monday, Stana Katic says. The actress previews a major episode ahead in this TV Fanatic interview.

Castle returns with a new episode on September 19. Check out three scenes from the episode “Rise” now.

Castle kicks off season four on September 19. Check out a slew of photos from the opener right here and now!

Penny Johnson Jerald is headed to Castle. It doesn’t sound like this will bode well for Castle himself.