Stingray S01E05 -The Loch Ness Monster

Admiral Denver fishing on Loch Ness is attacked by the monster. Back at WASP debate rages if the creature exists or if the admiral imagined it. To win the argument Shore orders the Stingray to investigate. Marina refuses to go and Atlanta steps in. They stay overnight at a castle overlooking the loch and during the evening they are woken by strange noises, a search reveals nothing of consequence. Next day they take Stingray out onto the Loch and encounter the monster. Taking evasive action they fire a missile.