RACE AGAINST TIME. As Laura and Rich race against time in a submersible they realize the "unidentified species" are laying thousands of eggs on the ocean floor. Meanwhile, Miles hears a report of a vicious attack on two electricians working on a marine dock, and suspects that Nimrod may be the culprit. Elsewhere, Phil stakes out an underwater power cable in hopes of finding Nimrod only to discover Nimrod now has a lot of underwater friends.