"I know where babies come from, Castle - just not this one."
We don’t have all of the answers, Castle,
not right now, at least.
“When I come home, I just want to relax”
"We’re both Alphas. And it says that we need to defined our shared territory together. These are…pieces all over this are on my stories, but the shells…that’s ours."
Kate Beckett in Season 6.
See, we’re both Alphas.