Re: Castle Season 5 (including Spoilers)
Also, did you notice that the opening scene foreshadowed the killer's identity?
Yes, which was why the "Captain" says something along the lines of, "am I the only one who finds something oddly familiar about this?" when the gun is held to his head.
"Live long and prosper."
-Abraham Lincoln to the train conductor at Gettysburg, PA Novemember 1863