: Castle attempts to buy a police scanner. When the owner offers him child pornography, Castle's "code" is revealed; he brutally punishes the owner, distinguishing himself from a common criminal by targeting those he deems truly "vile".
: They attempt to protect Grotto, a survivor of the Irish mob massacre, by negotiating a deal with District Attorney Samantha Reyes. [S2E2] Dogs to a Gunfight
While Matt recovers, Foggy Nelson and Karen Page take center stage in the "Legal Fu" aspect of the show. : Castle attempts to buy a police scanner