Does Castle's finale have a cliff-hanger like last year's? I'm not sure I could handle that! — Jessica
ADAM: Creator Andrew W. Marlowe
hints that Beckett will be experiencing a lot of changes in the finale,
and the domino effect of said changes leads to this season's climax.
And while I'm pretty sure that no one's life will be hanging in the
balance, Castle-Beckett fans will likely still be in for a long summer.
Why? Marlowe says this finale doesn't lend itself to a large time jump
between seasons. "The way we're ending this season, people will want to
know what happens in the immediate aftermath," he teases.
Source: TV Guide