Romantic tension comes to a head on next week's season finale of Castle.

Monet Mazur will reprise her role as Gina Cowell, Castle's former wife and book editor.

This arrival simply adds to the triangle already in existence between Beckett, Demming and Castle, all of which forces the partners in crime-solving to confront their feelings for each other.

Oh, and there's also a dead intelligence operative at the center of the latest case. Watch the following preview for "A Deadly Game."

[video url="http://www.tvfanatic.com/videos/castle-season-finale-promo/" title="Castle Season Finale Promo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.