Episode one will premiere on BBC One and BBC iPlayer at 9pm on Sunday 29 August, with episode two at 9pm on the Bank Holiday Monday, 30 August. Vigil will then continue each Sunday night, with new episodes premiering weekly on BBC One and BBC iPlayer.

The six-part drama from World Productions (Line Of Duty, The Pembrokeshire Murders, Save Me, Bodyguard) stars Suranne Jones, Rose Leslie, Shaun Evans, Martin Compston and Paterson Joseph.

When a crew member is found dead on board the Trident nuclear submarine HMS Vigil, police in Scotland are called in to investigate. The catch? The UK’s nuclear deterrent must remain unbroken, so the submarine stays on patrol and Detective Chief Inspector Amy Silva (Suranne Jones) must go aboard to begin an investigation. Although the death was written off as an accidental overdose, Amy suspects foul play. But when the crew close ranks in the face of Amy’s questioning, a new threat overshadows her inquiry.

Vigil’s stellar ensemble cast also features Anjli Mohindra, Connor Swindells, Adam James, Gary Lewis, Stephen Dillane, Lolita Chakrabarti, Daniel Portman, Lorne MacFadyen and Lauren Lyle.

The fictional six-part series is written and created by BAFTA-nominated writer Tom Edge, with episodes by Ed Macdonald and Chandni Lakhani. It is directed by Bafta-winner James Strong, and Isabelle Sieb. Vigil is produced by Angie Daniell, executive produced by Simon Heath and Jake Lushington for World Productions, Gaynor Holmes for the BBC, James Strong and Tom Edge.

Vigil is set and was filmed in Scotland, and is supported by the National Lottery through Screen Scotland. International distribution is handled by ITV Studios.