Thanks to @Murderboard for sending us the following..
When Castle tackles a Comic-Con-inspired episode later this season, the show will have the sci-fi bona fides to back it up.
Star Trek: Deep Space Nine alum Armin Shimerman will guest-star as Benjamin Donnely, a tech geek who manufactures authentic props for people's costumes at sci-fi conventions, TVGuide.com has learned exclusively. We hear he'll be a little too eager to show Beckett (Stana Katic) how all his guns work.
Additionally, the show has cast Christina Moore (That '70s Show, Hawthorne) to play Stephanie Stern, the actress who played "Lt. Chloe." Unlike Winters, Stern has gone on to a successful movie career.
Source: TV Guide
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