ABC has released official guide and few promotional photos for Castle season 4 episode 9, entitled "Kill Shot". Episode will air on November 21th.
- A sniper on a killing spree is terrorizing New York City. With the clock ticking down to the next murder and nothing to go on except a killer with no apparent motive but to instill terror, this could prove the team's toughest case yet.
- The hunt is made even more complicated when Beckett begins to experience increasingly strong moments of PTSD - moments she tries hard to hide from Castle and the detectives