How will Kate react when Rick thinks a murder involves the Antichrist on Castle? "Hell to Pay" is the 22nd episode of the show's eighth episode.

Will this be the last fans see of Caskett? "Crossfire" is the 22nd episode of the eighth season of Castle.

Rick and Kate are hot on the case as they attempt to get their eyes on LokSat on the Castle season 8 finale.

We know they are on LokSat's trail but where the heck are Castle and Beckett right now and who is Beckett calling?

We hate to say it but with LokSat bearing down on them, Kate Beckett looks scared.

Beckett and Castle are out manned and out gunned. None of this looks good.

We know this is a behind the scenes photo but it certainly is good to see our two favorite actors smiling.

Our favorite couple gets a phone call while under a peaceful looking tree. We guess the rest of this story won't be so peaceful.

Will this be the last we see of Kate Beckett? If so, no Castle fan will ever forget her. There is no Castle without both Rick Castle and Kate Beckett!

It may have begun with murder but Kate Beckett had a back story and Richard Castle was intrigued. As Castle said, "The point is, there's always a story. You just have to find it." From the moment he profiled Detective Kate Beckett while they read fan letters from his crazy fans, we were hooked. Beckett looked shocked and a little mortified by how close he got to her story. To his credit, Castle looked chagrined that his attempts at guessing her history seemed to cause her pain. For fans, it was the start of a complex and provocative relationship of which we could never get enough.

Castle and Beckett were shot in their own loft on Castle. "Crossfire" is the 22nd episode of the show's eighth season.

The main cast of the ABC series Castle included Seamus Dever, Tamala Jones, Jon Huertas, Stana Katic, Nathan Fillion, Molly Quinn, and Susan Sullivan.