Head Case

Castle and Beckett investigate a crime scene that involves a large pool of blood, but no victim. The victim had a cryogenics contract, triggered by an alarm which goes off when the victim's heart stops beating. Taking the bullet out would 'kill' the corpse, so the severed head remains frozen and at the cryogenics laboratory. When Ryan and Esposito find needles with the victim's brain matter on it, the case takes a turn when Lanie discovers that someone was doing procedures to the victim's head. Alexis receives news about Stanford.