Vigil 1x3 -

A reactor malfunction nearly caused a "Fukushima-style" meltdown.

: Files on Burke’s stolen USB stick reveal an illicit affair between the sub’s medical officer, Lt. Tiffany Docherty , and the coxswain, Elliot Glover . Burke had been using photos of the two to blackmail or "shitlist" the crew. Character Revelations

: MI5 agents begin openly trailing Kirsten Longacre on land, signaling that the investigation has moved beyond a simple murder case into a matter of national security.

: Kirsten discovers that the murdered activist Jade was the illegitimate daughter of MSP Patrick Cruden , a prominent anti-Trident politician.

: 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.