Synopsis:

CASTLE AND BECKETT HUNT DOWN A SERIAL ARSONIST, WHILE JENNY GOES INTO LABOR, ON ABC'S "CASTLE"

"Under Fire" - When Castle and Beckett discover that the victim of a building fire was actually shot to death, they get on the trail of a serial arsonist turned murderer. Meanwhile, Ryan's wife, Jenny, goes into labor, but disaster threatens to ruin the joyous moment, on "Castle," MONDAY, JANUARY 6 (10:01-11:00 p.m., ET) on the ABC Television Network.

"Castle" stars Nathan Fillion as Richard Castle, Stana Katic as NYPD Detective Kate Beckett, Susan Sullivan as Martha Rodgers, Molly Quinn as Alexis Castle, Penny Johnson Jerald as NYPD Captain Victoria Gates, Tamala Jones as Medical Examiner Lanie Parish, Jon Huertas as NYPD Detective Javier Esposito, and Seamus Dever as NYPD Detective Kevin Ryan.

Guest Cast: Juliana Dever as Jenny, Wendy Davis as Delia, Nic Bishop as Fire Chief Miller.

"Under Fire" was written by Andrew W. Marlowe & David Amann and directed by Paul Holahan.

I really enjoyed this episode. Even though I knew they weren't going to kill Esposito and Ryan, it was still kinda intense to watch them figure out what was going on.

That was a very good episode. Yeah, you knew that they wouldn't kill them off, but they still found a way to make it tense. They again made great use of Castle's fantastic ensemble cast.

For me, Castle is, "Must see TV." Nathan Fillion is always great, and Stana Katic is something special. I'll watch Castle over almost anything else on TV.

I've been losing interest in Castle this season (I usually get home and start watching halfway through each episode and don't go back to watch the rest), but this was a really good episode.

I enjoyed this. They fooled me at the end thinking one of them may not make it out.

They need to figure out a way to get Castle more involved. I enjoy the ensemble, but there has been a lot less focus on Castle and he seems less important figuring out the central mysteries.