I love you, Kate...

So uttered Rick Castle on the season three finale of this ABC hit, and so utters this author-turned-quasi-detective at the conclusion of the following promo. It doesn't reveal any upcoming scenes from season four, but it does take viewers back on the journey of one of our favorite fictional tandems.

What does the future hold for Kate and Castle? Hopefully events and exchanges as emotional and as entertaining as their past...

For more on what's ahead, visit our section of Castle spoilers.