Castle Season Finale Promo: A Closed Caskett?

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She wouldn't... would she?

They can't... can they?

After 23 episodes, Castle Season 5 has driven home the point that long-time viewers have known since this show's inception: Kate and Rick are perfect for each other!

But last night's "The Human Factor" brought up the possibility that Beckett's professional future may in Washington D.C., as she received a job offer that will play a pivotal role on next Monday's finale.

Would she actually move? Could Caskett actually split? Or is all this leading to the Proposal of the Spring? Watch the official ABC teaser now and prepare for an emotional conclusion either way:

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

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