Castle Season 5 finale spoilers indicate some "emotional" story developments. Could it be any more emotional than what we've seen last year in "Always?" Fans are anxious to find out whether series creator Andrew Marlowe would break-up Rick Castle and Kate Beckett this year, or cement their relationship through some serious crisis.

Marlowe earlier told TV Line fans will be "dealing with something very explosive, personally." In GiveMeMyRemote, Marlowe said, "Beckett triggers a bomb and is put in a position where she can't move or the bomb is going to go off. It's a high- stakes, high-tension episode."

So we know things will be explosive -- in a literal way. Still, it does not mean that there won't be explosive developments that could crush the viewers' hearts.

Castle Season 5 Finale: Title, Overview

Castle Season 5 finale is called, "The Human Factor," as seen in TV.com. The "human" in the title suggests Castle (and Beckett) would face situations with which everyone can relate. What could these human factors be? We guess: vulnerability, insecurity, and self-doubt.

Marlowe explained Castle and Beckett will confront some serious questions in their lives. They will put their relationship under a microscope and ask relevant questions. "Are we moving forward? Are we not moving forward?" he teased the viewers.

"I think that we look to explore some of those questions which are very human, very natural questions at the point in the relationship where these two characters are." And that explains the Castle Season 5 finale title, "The human factor."

What answers would the couple find in the end? In a previous episode, we've seen Beckett try to draw Castle closer to her, to open up, to speak of his fears and his deepest thoughts. These same issues drove Alexis' mom Meredith away from their marriage. She realized Castle was not going to change. Would Beckett arrive at the same conclusion? Get your Kleenex ready.

VIDEO: Castle Season 5, Episode 20, "The Fast and the Furriest"

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