Castle Season 5 finale spoilers include the words "human," "explosive" and "emotional." Stana Katic, who plays half of the Cas-kett pair, teased fans on Twitter with a little treat. She also showed some love for the avid supporters of the Rick Castle-Kate Beckett romance.

Stana Katic teased fans with a little bit of this year’s Castle finale script. “And so begins the FINALE, gangstas," she tweeted. (Image: Twitter)

"The Human Factor" is the title of the Castle Season 5 finale episode. Castle and Beckett will be dealing with a lot of things human. They will come face to face with their mortality (again). They'll be confronting some deep-seated questions in their minds. These are some of the things that series creator Andrew Marlowe has so far told followers of the procedural dramedy series.

Stana Katic teased fans with a little bit of this year's Castle finale script. "And so begins the FINALE, gangstas. See u on the other end of this rabbit hole," she tweeted. We see a few words on the page of a script, but we could only determine one thing: it is a scene involving Esposito. (That's a wink from Stana!)

Katic also showed some love to fans, many of whom have eagerly supported the Cas-kett tandem since the pilot episode. TV Guide magazine has recently named Castle and Beckett as its favorite couple. She also tweeted:

"This couple only works [because] of fans like [you]!!! And because of an incredible crew [and] castmates.I am very lucky [to be with you] all. [Kisses]"

Katic didn't dish the major Castle Season 5 finale spoilers, but Marlowe did.

Season 5 Finale Spoilers: Stana Katic Dishes Teaser, Shows Love for Avid Cas-kett Fans (Twitter)

"[The finale will be] an emotionally charged episode. In the process of doing an investigation into a bombing, 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," Marlowe revealed. The show runner added, TV viewers' favorite romantic-funny couple will be asking some serious questions: "Are we moving forward? Are we not moving forward?"

Castle Season 5 finale is scheduled to air on May 13 (Monday).

More IB Times Entertainment/Tech Features:

Castle Season 5 Finale Spoilers: Break-up or no break-up for Cas-Kett? [PHOTOS]
HTC One, Samsung Galaxy S4, Apple iPhone 5S Shopping Tips: Which is the Best New Phone for You? [PHOTOS]
Miss Universe 1st Runner-up Janine Tugonon, Ex-BF and The Script Frontman Danny O'Donoghue on Twitterverse [Haters, Funny Tweets]