Behind-the-Scenes of Castle's Zombie Episode: Stana Katic Poses With Writer Christine Boylan (PHOTO)

Last night, Castle executive producer Laurie Zaks tweeted an adorable behind-the-scenes picture of show writer Christine Boylan hanging out with some random "chick" on set.

@KitMoxie on the last day of her episode," Laurie wrote. "Not sure who the chick is next to her."

"my sista from anotha mista," Stana Katic replied, tongue-in-cheek.  

It's no wonder the ladies were having so much fun — they were were hard at work filming Christine's zombie-themed episode, "Undead Again," which deals with a group of suspects who participate regularly in "zombie walks."

Stana got in on the tweet-action last week when she posted this hilarious on-set picture of Kate Beckett's encounter with the walking dead.  

Now that the zombie apocalypse is safely behind them, Stana and the rest of the Castle crew can begin filming the much-anticipated Season 4 finale, "Always," which is set to air on May 7, 2012.

Can you believe it's over already?!

Source: Twitter