Castle Promo For Season 5, Episode 21: “The Squab and the Quail”
Beckett must protect a charismatic billionaire whose life is in peril, prompting her to ponder her romance with Castle as it reaches a standstill. Meanwhile, Castle begins feeling insecure, so he tries to get the billionaire's case solved quickly.
Castle Season 5, Episode 21, "The Squab and the Quail," airs Monday, April 22 at 10 p.m. ET on ABC.