‘Castle’ Video Preview: How will Beckett and Castle deal with his diagnosis?

Castle fans were on top of the world after the season six premiere when Beckett gave Castle the answer we’d waited all summer to hear: “Yes, I’ll marry you.”

But then the episode took an unfortunate turn and Castle was exposed to a deadly toxin and Beckett was tasked with telling her fiancé that he had less than 24 hours to live. We weren’t quite expecting that ending.

And sure, we know the show is called “Castle” and they will find a way to cure him before the end of the next episode “Dreamworld.” That doesn’t mean we’re not excited for the journey and looking forward to seeing how the FBI can track down the people responsible and find the antidote before it’s too late.

Of course what we’re really interested in is watching Kate and Rick in action. There were some great romantic moments in the premiere and we have a feeling there are going to be even more in this one.

Check out the clip below where Castle proves just how much he’s been paying attention to Beckett’s tactics over the past five years and then swoon with us when she gives her response.

Castle airs Monday, Sept. 30 at 10/9c on ABC.