After Lewis retired, Hathaway took his exams, passed with flying colours and is now a detective inspector. But he's struggling with being in charge and driving all his DS's away!
So Superintendent Innocent decides to bring Lewis out of retirement to help Hathaway with his first murder case. Bringing the worlds of neurosurgery, blood sports and animal rights together, it's a tricky mystery that soon starts to spiral out of control.
With Lewis back in the fold, can the men accept the new dynamics? Will Hathaway hang on to his latest DS – played by Angela Griffin? And can they solve the case?
Lewis, ITV, 9pm