CASTLE Season 6 Episode 13 Limelight Photos : CASTLE – “Limelight” – When a rising young pop star is found dead in an alley, Castle and Beckett delve into the victim’s out-of-control hard-partying lifestyle, but as they dig deeper, a shocking revelation threatens to rock their investigation, on “Castle,” MONDAY, JANUARY 20 (10:01-11:00 p.m., ET) on the ABC Television Network. Alexandra Chando (“The Lying Game,” “As the World Turns”) guest stars in the episode.