: Investigations on land by DS Kirsten Longacre and on the sub by Silva uncover a near-catastrophic incident at Port Havers, Florida 18 months prior.
The incident resulted in the deaths of , which the Navy officially covered up as drownings. Vigil 1x3
: Wreckage from the sunk trawler Mhairi Finnea reveals that it was actually a US Los Angeles-class submarine , not a Russian vessel, that dragged the boat down while covertly tracking the HMS Vigil. : Investigations on land by DS Kirsten Longacre
: Kirsten discovers that the murdered activist Jade was the illegitimate daughter of MSP Patrick Cruden , a prominent anti-Trident politician. not a Russian vessel