Beckett asks Castle to stop making fun of Nebula-9. She loved dressing up as Lieutenant Chloe because the character didn’t care what anyone thought of her. As for the show itself, it was silly for sure. But it was also about leaving home for the first time, searching for your identity and making a difference. Castle agrees to 86 all snarky comments regarding the show. This is just before he notices his hand glowing about the Nebula-9 ship. It’s the same hand he used to fire the laser blaster. Beckett believes her partner just solved the case.
All prime suspects are brought aboard the Nebula-9 ship. Castle enlists Stephanie Frye’s help to reenact the murder scene. He lets everyone know that the person who shot the blaster has a superficial burn on his or her hand that is visible under UV light. Gabriel Winters has just such a burn, but he’s not the killer. No, the real murderer is his former co-star, Stephanie Frye. The original Lieutenant Chloe grabs the Nebula-9 captain’s blaster. Gabriel Winters quickly overpowers her, as he knew his weapon was set on stun. He lets Castle deliver his catchphrase to the currently cuffed Lieutenant Chloe. Castle says, “And may fortune guide your journey.”
Castle comforts Beckett now that the case is closed. It’s always hard to see your idols fall. But Stephanie Frye wasn’t really Beckett’s idol. Lieutenant Chloe was. As far as Beckett is concerned, she’s still out there fighting evil and saving humanity—just like a certain Earth-based couple we know. Beckett even gives Castle a treat by dressing up in her old Lieutenant Chloe costume. Too bad her super sexy space suit is topped off with a hideous Creaver mask. Hey, did you catch William Shatner belting out his “Ideal Woman” as background music? Kirk, out!