CASTLE “Knockdown” Season 3 Episode 13 Photos January 14, 2011 Castle, News Check out photos from CASTLE Season 3 Episode 13 titled “Knockdown” which airs on Monday January 24 at 10pm on ABC. You can read all our coverage of Castle here. Episode Synopsis: CASTLE “Knockdown” Season 3 Episode 13 – Old wounds are reopened when the retired lead detective on Beckett’s mother’s homicide case contacts her with new information, but then is gunned down right in front of Beckett before he can tell her what he knows. The investigation into his death leads back to a decades-old conspiracy that may hold the answer to who was behind Beckett’s mother murder and why. With the stakes and emotions running high, Castle and Beckett take their partnership to the next level, on “Castle,” MONDAY, JANUARY 24 (10:01-11:00 p.m. ET). Max Martini guest stars Click Any Photo Below To Enlarge Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)