Season 1

Season 1
Season 1

Season 1

Distributed by ITV Studios Global Entertainment

2021 6 x 60'

Written and created by Bafta-nominated writer Tom Edge (Judy, The Crown, Strike) with episodes by Ed Macdonald (The End Of The F***ing World) and Chandni Lakhani (Dublin Murders). The fictional drama will be directed by Bafta-winner James Strong (Broadchurch, Vanity Fair, Liar) and Isabelle Sieb (Shetland, The Athena).

The series will star Suranne Jones (Gentleman Jack, Doctor Foster), Rose Leslie (Game Of Thrones, The Good Fight), Shaun Evans (Endeavour, Whitechapel), Anjli Mohindra (Bodyguard, Bancroft), Martin Compston (Line Of Duty, Mary Queen Of Scots), Paterson Joseph (The Leftovers, Peep Show), Connor Swindells (Sex Education, Jamestown), Adam James (Belgravia, Doctor Foster), and Gary Lewis (His Dark Materials, Billy Elliot).

The mysterious disappearance of a Scottish fishing trawler and a death on-board a Trident nuclear submarine bring the police into conflict with the Navy and British security services. DCI Amy Silva (Suranne Jones) leads an investigation on land and at sea into a conspiracy that threatens the very heart of Britain’s nuclear deterrent.


  • Tom Edge - EP1,2,5+6
  • Ed Macdonald - EP3
  • Chandni Lakhani - EP4


  • James Strong (EP1-3)
  • Isabelle Sieb (EP4-6)


  • Angie Daniell

Top Billed Cast

  • Suranne Jones
  • Rose Leslie

Executive Producers

  • Simon Heath
  • Jake Lushington
  • Tom Edge
  • James Strong

Available On

  • BBC iPlayer