Waking the Dead - Series 5 - Undertow - Part 1

Police drama series based around cold cases. The CCHQ team discover the existence of a serial killer, Steven Hunt, who is serving nine months in prison for benefit fraud and is about to be released. The team must solve the murders he committed in the past in order to prevent him from committing any more, but with nothing other than coincidences and hunches they can't stop him from leaving prison and beginning a killing spree.