The season opener starts with Kate and Rick in bed. Enjoying their coffee, they talk about how wonderful the previous night was and Castle even talks about how he hopes it wasn’t just a circumstantial episode. Just as they are about to start another round, Castle’s mom, Martha, shows up and Rick sends Kate and their relationship into the closet—literally and figuratively. Beckett’s not happy, and why should she be?
Turns out Martha came home early from the Hamptons because Alexis darling got too drunk at her graduation party and is now super hung over.