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Under the Gun
Season 3, Episode 3
Under the Gun.jpg
Air date October 4, 2010
Written by Alexi Hawley
Directed by Bryan Spicer
Episode guide
He's Dead, She's Dead
Castle season 3 cast.jpg
Season 3
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Season 2   Season 4

Under the Gun is the third episode of the third season of Castle.


With the latest case of a murdered bail bondsman, Beckett discovers that Castle's wild imagination and theories may be on the mark. Beckett's ex-partner makes a surprise arrival and Castle is forced to watch the two reminisce and engage in a little romance.




Main Cast

Guest Stars


Beckett: Well, bikes are what girls want when we realize that we’re never going to get a pony.
Castle: Did you have one?
Beckett: I still do. ’94 Harley soft tail. Worked all of high school to pay for it.
Castle: And how did your parents feel about it?
Beckett: Well, my dad threatened to send me to a nunnery. And my mom just shook her head and said, "Katie, every time you ride that thing, just remember how much you hate hearing me tell you 'I told you so'."
Ryan: You know, if this were a horror movie, we'd be the first ones killed, splitting off like this.
Esposito: Yeah, except we're not a couple of top-heavy co-eds out looking for fun. We're highly-trained officers of the law, with enough firepower to take out a horde of undead.
Ryan: Hispanic and cocky. Yeah, you definitely die first.
Castle: You know, if this were a horror movie,...
Beckett: Castle, focus.
Ryan: Shut up and get in the box.
Castle: Oh. Actually, I was going to hang back with Royce. Hear some stories about the good old days.
Beckett: Okay, fine. But if you tell him about the karaoke stakeout, I’m going to tell him what happened with the monkey.
Royce: My lips are sealed.
Royce: Yeah, okay, so you know what she does? She offers to show the guy her boobs if he drops the spear gun.
Esposito: Did he?
Castle: Did you?
Beckett: No. Because he had the same slack jawed look that the two of you have.
Royce: Allowing me to take the guy down. But I’ll tell you what I realized in that moment. You gotta be ready for anything.
Castle: Wow. I’m seeing a whole new side of you today - and feel free to show me more.
Beckett: Do you see what happens when you feed the animals?

Featured Music

  • "Healing Hands" - Citizen Cope


  • It's revealed in this episode that Beckett while in High School, she worked through school to buy herself a 94 Harley Davidson Softail which she still has today.
  • Castle's mention of being "really close" with his CIA conspiracy hypothesis is a reference to "A Deadly Game".
  • Beckett and Royce used be partners before she became a detective.
  • When walking in the cemetery, Ryan and Castle talk about what happened in horror movies when they split up in cemetery and got worried.
  • Alexis begged her dad for a Vespa scooter.
  • Watch for: Beckett's face when she turns away from Castle after she tells him that her confession that she had been in love with Royce was just an act.