One of Britain's longest running crime dramas. Seventeen years after leaving the Lyell, Sam Ryan returns asking for the team's help after a political assassination. The shooting of the Health Secretary pulls Lyell into a world of intrigue and betrayal.
- S25 E1 – History, Part 1Sam Ryan recruits the Lyell team to investigate the assassination of the health secretary, but Nikki is unsure whether Sam knows more than she's letting on.
- S25 E2 – History, Part 2DNA evidence linked to the health secretary’s assassination forces Nikki to face her past in the present.
- S25 E3 – History, Part 3When Florence Clarke confesses to the murder of her husband, the investigating detective reveals a startling connection to a painful secret for Simone.
- S25 E4 – History, Part 4Jack’s father sends him on an urgent mission into the mysteries of his past. Meanwhile, Nikki and Simone investigate a body that seems to hold puzzles of its own.
- S25 E5 – History, Part 5The death of an investigative journalist throws the spotlight onto Sam Ryan. Nikki begins to realise that the implications of her discoveries will challenge the principles of forensic science.
- S25 E6 – History, Part 6Events lead Nikki to conclude that getting the truth will put the Lyell team and everything they love in danger.