Trivia / Castle S 1 E 9 Little Girl Lost

• First Appearance: Albeit as The Ghost, this is the first time we learn about Ryan's girlfriend, later wife. She buys him an ugly tie for their two week anniversary.
• Production Posse: This is the first episode of several to have one of Fillion's fellow Whedon alums as a guest star. Bailey Chase, aka Federal Agent Will Sorenson, played Graham Miller, a military monster hunter, in the fourth season of Buffy the Vampire Slayer.