Season 3, Episode 5:
When the UCOS team reinvestigates the suspicious murder of Craig Rossiter, they find themselves at the centre of a plot involving witchcraft, magic and curses. Rossiter, a librarian, had been a member of a coven and, when he died 10 years ago, there were few clues as to the cause of death. The team has to infiltrate the coven and speak to other members in order to get answers, but the investigation leaves them all feeling very uneasy.
A motley crew of retired police officers re-opens troublesome cases that were never laid to rest.