The crew wait out the storm so they can restore communications and be rescued. As they struggle against the cold, they find the NTIs have formed an animated column of water that is exploring the rig. Though they treat it with curiosity, Coffey is agitated and cuts it in half by closing a pressure bulkhead on it, causing it to retreat. Realizing that Coffey is suffering paranoia from high-pressure nervous syndrome, the crew spies on him through a remote operated vehicle, finding him and another SEAL arming the warhead to attack the NTIs. To try and stop him, Bud fights Coffey but Coffey escapes in a mini-sub with the primed warhead; Bud and Lindsey give chase in the other sub, damaging both. Coffey is able to launch the warhead into the trench, but his sub drifts over the edge, crushing him when it implodes. Bud's mini-sub is inoperable and taking on water; with only one functional diving suit, Lindsey opts to enter deep hypothermia when the ocean's cold water engulfs her. Bud swims back to the platform with her body; there, he and the crew administer CPR and revive her.