SILENT WITNESS

BBC1, 9pm

Amanda Burton returns as

Sam Ryan to mark the long-running crime drama’s 25th anniversary.

The six-parter begins in Liverpool, where Sam seeks to usher in democratic health care, but the shooting of the Health Secretary and Sam’s husband pulls Dr Nikki Alexander, Jack Hodgson and Simone Tyler

(Emilia Fox, David Caves and Genesis Lynea) into a world of duplicity and betrayal. When the credibility of DNA testing is challenged, the bedrock of forensic science is called into question. Now uncertain of who or what they can trust, the Lyell team’s investigation draws them into confrontations with their past that threaten their present. Plus, following their kiss, Jack and Nikki navigate their feelings for each other.