1Episode 1
PC Kat Crichton confronts her past when assigned to a murder case on the Isle of Harris.
2Episode 2
Kat fights to gather evidence against Sir Douglas, but new revelations change everything.
3Episode 3
The case is coming to a close, but Kat still believes the Macleans are hiding something.
4Episode 4
With her career hanging in the balance, it's Kat's last chance to catch Mary's killer.