'The Big Crunch' is the fifth story from the internationally acclaimed series 'Cracker', winner of two BAFTA Awards, and created by the celebrated writer Jimmy McGovern. Fitz (Robbie Coltrane) is a brilliant Criminal Psychologist with a dark side - a side dependent on a cocktail of alcohol and gambling. He lectures at the local university and profiles suspects for the Manchester Police Force. An illicit rendezvous witnessed in a park initially appears to be a clear case of adultery, but on closer inspection a darker picture develops. A man abuses his position of trust to recruit young girls into his religious sect. Morality is turned on its head when an innocent young girl is 'punished' for the wrong doings of her 'priest'. Bearing all the symbolism of the serpent rearing its ugly head in the Garden of Eden, a world of religious fanaticism, hypocrisy and perversity unfolds. Appearances prove to be deceptive as Fitz attempts to unearth the most sinister truths behind the religious facade with spine-chilling consequences.