Beckett returns to work after recuperating from being shot, and both she and Castle are determined to find her shooter. Beckett also deals with PTSD, but she tries to hide it from her colleagues. Will homicide detective Kate Beckett survive a gunshot? Did she hear Castle profess his love in the shocking season finale? An all-new season kicks off with exciting discoveries, challenging cases and a tough, new NYPD captain shaking things up.