Frozen starts with a shrink having a panic attack. She hyperventilates into her hand-bag and then gets drunk on an aeroplane where she yells out, ‘We’re all going to die.’ She’s a bit loopy, clearly, which is how lazy playwrights make psychologists interesting. The shrink’s task is to examine Ralph, a serial murderer of children, and to deliver a lecture on the cause of his malignity.