[s2e8] Kill The Messenger -

If you were referring to a different series or the film, here are brief summaries: "Castle" Kill the Messenger (TV Episode 2009) - IMDb

: Castle’s attempts to add "flair" to the case briefing by referencing the Kevin Bacon movie Quicksilver provide the usual banter between him and Beckett. [S2E8] Kill the Messenger

: Critics noted the depth of Captain Montgomery’s character as he grapples with the guilt of a past failure that left an innocent man in prison. If you were referring to a different series