S1.E1 ∙ Episode #1.1 Sat, Aug 28, 2021 When a crew member is found dead aboard the Trident nuclear submarine HMS Vigil, DCI Amy Silva is flown out to investigate. 7.8 /10
S1.E2 ∙ Episode #1.2 Sun, Aug 29, 2021 With Vigil in danger, Amy must fight to continue her investigation. Meanwhile, Kirsten's enquiries lead to tragedy. 7.8 /10
S1.E3 ∙ Episode #1.3 Sat, Sep 04, 2021 Kirsten's investigation takes her into the heart of Scottish politics, but when she unearths a navy cover-up, it leaves Amy questioning who she can trust on Vigil. 7.7 /10
S1.E4 ∙ Episode #1.4 Sat, Sep 11, 2021 Kirsten closes in on the killer, but their capture reveals the grave threat that Vigil faces. On the submarine, Amy makes a terrifying discovery. 7.6 /10
S1.E5 ∙ Episode #1.5 Sat, Sep 18, 2021 Vigil is forced into lockdown as disaster strikes. With communication lost, Kirsten desperately hunts for clues to the source of the threat to Vigil. 8 /10
S1.E6 ∙ Episode #1.6 Sat, Sep 25, 2021 Amy is trapped and running out of time. Vigil’s crew must identify the traitor or risk tragedy. 7.6 /10