One romance is about to end on Castle... while another is set to begin.

According to television spoiler guru Michael Ausiello, "a pivotal couple" on the show will soon break things off. He confirms this revelation to be a reference to either Castle and Gina, or Beckett and Josh.

Conversely, fans can look forward to an interoffice romance that will start up January.

Who will it be between? Take your best guess now!

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