3x03 Under the Gun
First Aired: Oct. 04, 2010 on ABC
Summary: When a coded document attracts Castle's attention, Beckett must steer the case back to the violent felons who populated their victim's world; when Beckett's ex-partner arrives, Castle must watch the relationship become romantic.
Main Characters in this Episode
Martha Rodgers: This is Alexis we're talking about. She has never met a challenge that she hasn't attacked like Attila the Hun!
Kate Beckett: Bikes are what girls want when we realize we're never gonna get a pony.
- Goof (revealing mistake): During Castle and Beckett's visit to the morgue, as Lanie hands them the piece of paper in the victim's sock, you can clearly see the "corpse" give one sudden deep breath.