2021
S01E05 finale
The Deeper You Go The Darker It Gets
The mysterious disappearance of a Scottish fishing trawler and a death on-board the submarine HMS Vigil bring the police into conflict with the Navy and British security services. DCI Amy Silva and DS Kirsten Longacre lead an investigation on land and at sea into a conspiracy that goes to the very heart of Britain's national security.
S02: Following deaths at a Scottish airbase, DCI Amy Silva and DS Kirsten Longacre undertake a brand new investigation into the world of drone warfare...
Kirsten closes in on the killer, but their capture reveals the grave threat that Vigil faces. On the submarine, Amy makes a terrifying discovery.