Series six will follow DI Khan and DCI James as they investigate cold cases and unsolved crimes from the past, unravelling secrets and unearthing buried truths along the way.

The new series opens with the clock ticking down to DCI James's first day in her new job with an unforeseen and devastating introduction to her family life. Determined to make a good first impression with her new colleagues, will Jess be in the right frame of mind to deliver and inspire the team? And inevitably how will the ghost of much-loved former colleague Cassie Stuart haunt her? After all, Cassie will be big shoes for her to fill. Does she have the resolve, professionalism and spirit to live up to her much-admired and respected predecessor? 

Jess's first case is the discovery of human remains in a newly renovated period property in Hammersmith, London. But how long have they been there and is this a murder dating back to the 1930's or has the body been disposed of in more recent times?