Season guide

Vigil: Series 1

6 episodes Premiered Aug 29, 2021 Updated Jul 22, 2026

Season 1 Episodes

Episode Guide

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Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

67%

33%

Mytharc (4): Crucial lore & season climaxes

Core (2): Character development & subplots

Side Quest (0): Standalone / filler

S1·E1 Mytharc

Episode 1

Aug 29, 2021 · 58 min

When a crew member is found dead aboard the Trident nuclear submarine HMS Vigil, Detective Amy Silva is flown out to investigate.

S1·E2 Core

Episode 2

Aug 30, 2021 · 58 min

With Vigil in danger, Amy must fight to continue her investigation. Meanwhile, Kirsten’s enquiries lead to tragedy.

S1·E3 Core

Episode 3

Sep 5, 2021 · 58 min

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.

S1·E4 Mytharc

Episode 4

Sep 12, 2021 · 58 min

Kirsten closes in on the killer, but their capture reveals the grave threat that Vigil faces. On the submarine, Amy makes a terrifying discovery.

S1·E5 Mytharc

Episode 5

Sep 19, 2021 · 58 min

Vigil is forced into lockdown as disaster strikes. With communication lost, Kirsten desperately hunts for clues to the source of the threat to Vigil.

S1·E6 Mytharc

Episode 6

Sep 26, 2021 · 58 min

Amy is trapped and running out of time, but will assistance arrive too late? On land, Kirsten chases down the traitor’s accomplice. When the traitor on Vigil puts their plans into