Nathan Fillion gives good interview. It's just a fact, although I realize not a very surprising one.

Going into the fourth season of 'Castle' (premieres Mon., Sept. 19, 10PM ET on ABC), he's still so invested in the Castle-Beckett relationship, the storylines, the ideas for where to go next, even the guest stars. He loves 'Castle' as much as the fans do, and it shows.

I caught up with Fillion to talk all about the jaw-dropping Season 4 premiere -- after last season's shooting and the big "I love you" cliffhanger, we certainly find our favorite will they-won't they TV couple treading new ground.

Fillion dished about women, Castle's usual distraction when things get tricky with Beckett, but also the new boss ("She's so mean!") and maybe, possibly getting Castle officially deputized to do some real policing.

Then we talked about this season's 'Ghostbusters'-inspired Halloween episode, Fillion's dream scenario for Season 4 and his personal casting choice to play Castle's dad that got him all choked up just talking about it.

Warning: There are some mild spoilers from the Season 4 premiere ahead.

For my money, 'Castle' wins the award for most jaw-dropping cliffhanger of the last season. Now that it's almost back -- one more week! -- we've got an exclusive sneak peek of the Season 4 premiere to ramp up your anticipation even more.

We've seen Lanie (Tamala Jones) wheeling a seriously wounded Beckett (Stana Katic) into the ER, and Castle's (Nathan Fillion) look of utter despair in the previews. In this extended scene from the first episode back (premieres Mon., Sept. 19, 10PM ET on ABC) we also see what happens once Beckett is inside the operating room -- including who is operating on her.

Watch this clip and tell us: Are you excited to see where things pick up with Castle and Beckett once she's better? Especially after Castle's big confession? And do you think Kate will remember what Castle said to her?