Liopleudon enters submarine HMS Gartside through an underwater anomaly, though the sub's captain bans the team from bringing their weapons on board and it is left to Connor to try and shoot the creature back through the hole on a torpedo. However the craft is sucked through the anomaly,causing a loss of power and is surrounded by a school of the creatures. Whilst Sir James dissuades a gung-ho admiral from nuking the area the team discharge the animal and return to their own time where Abby tries in vain to dissuade Connor from working for Burton before showing a Matt a newspaper cutting telling the fate of Emily.

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