'Castle' preview: Castle and Beckett cool their heels after cliffhanger
"Countdown" picks up right where "Setup" left off, with the partners stuck in refrigerated prison and a bomb speeding to somewhere in New York.
The dire scenario prompts some necessary canoodling and some surprisingly heartfelt confessions. But is it too late?
Probably not. Lead characters rarely die in the middle of a successful season. But we'll be tuning in anyways to see what Kate has to say when she comes to.