Stana Katic and Nathan Fillion Stana Katic and Nathan Fillion

I am delighted to have been asked to moderate Comic-Con's first-ever Castle panel this coming Sunday in San Diego. If you're there, please come see me have fun with Nathan Fillion and his co-stars. Now here's a little exclusive Castle Season 3 scoopage for you.

Save for a special two-parter, Rick Castle and Kate Beckett have been successful in apprehending their killers at the end of every episode. Unfortunately for the sexy sleuths, that's about to change around the seventh episode of the new season.

"We're creating an incredibly manipulative villain who will get away and become a thorn in their sides," teases creator Andrew Marlowe, who hopes his serial killer, known as '3xK' because he kills in threes, "will have the delicious appeal of a Hannibal Lecter." Yikes! Let's just hope 3xK doesn't turn Rick (who'll be a murder suspect himself in the Sept. 20 season premiere) into a...white Castle burger. Sorry. I promise my material will be better on Sunday (10:30 am, Room 6BCF).

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