: Lt. Docherty admits to falsifying drug tests for the crew following the Florida incident, claiming she did it to protect the careers of her colleagues. Key Tensions & Suspicion
: 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. Vigil 1x3
: DCI Amy Silva confirms that Craig Burke did not die of a head injury but was poisoned . She discovers a strange substance on his lips that matches residue found on his clothing. Vigil 1x3
: 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. Vigil 1x3