Series 4

01 What Will Survive: Part 1 Episode 14th March 2015 A young Estonian woman is found dead on a piece of waste-ground, suspected of being buried alive. As the team piece together her movements, they uncover a world of prostitution and drugs hidden behind a respectable veneer. 02 What Will Survive: Part 2 Episode 211th March 2015 The team are dismayed to discover that an arson attack at the Osgood's house has injured Michael and killed his autistic son Robbie. 03 Buried: Part 1 Episode 318th March 2015 A husband and daughter struggle to come to terms with their grief when the body of wife and mother Anaan Kamel is found washed up by an underground river. 04 Buried: Part 2 Episode 425th March 2015 Geoff has become a marked man and Banks decides to put both him and his daughter Evie under watch at an anonymous hotel whilst he increases the search for Mullen. 05 Ghosts: Part 1 Episode 51st April 2015 When the body of an undergraduate is found dumped in a ravine, the investigation into his stabbing reveals he was far from being a model student. 06 Ghosts: Part 2 Episode 68th April 2015 Helen works hard to win back Alan's approval as they try to find the killer and prevent Josh's father from seeking a revenge of his own.