Gil Family (2022)

S5E21 The Squab and the Quail

Beckett finds herself tasked with the protection of Erik Vaughn, a charismatic billionaire whose life is at risk, prompting her to reconsider her own relationship with Castle, which seems to have hit a lull. Meanwhile, filled with jealousy, Castle goes to great lengths to crack the case and create distance between Beckett and Vaughn.