1/6 When a sailor is found dead on submarine HMS Vigil, DCI Silva flies out to investigate. (R)
2/6 With Vigil in danger, Amy must fight to continue her investigation. (R)
3/6 Kirsten discovers a navy cover-up, leaving Amy questioning who she can trust on Vigil. (R)
4/6 Kirsten closes in on the killer, but their capture reveals a terrifying threat to Vigil. (R)
5/6 Vigil is forced into lockdown as disaster strikes. Amy risks it all to get to the truth. (R)
6/6 Amy is trapped and running out of time. The crew must find the traitor to avert disaster. (R)
