Re: Castle - Season 6 Discussion & Spoilers
The ending pretty much guarantees Beckett will be resigning and returning to her old job in NY. While DC is challenging and exciting, she would be happier knowing the criminals she catch are in jail rather than walking free just because they're powerful government officials. That, and she misses having Castle as her partner.
"Everything should be made as simple as possible, but no simpler." -- Albert Einstein