Jeremy Wade investigates a case in Nepal that sounds strangely familiar - a lone fisherman dragged off his feet & into a mountain river by an unseen creature. Is the original river monster, the goonch catfish, back from the brink?

Wade takes on the biggest investigation of his career -- to unravel what happened to over 1,000 passengers of the RMS Laconia, torpedoed in the mid-Atlantic; he travels the globe, battling giant fish, massive sharks and a deep-sea monster.

Traveling from London to Greenland and on to Norway, Wade follows the trail of an unknown sea monster; fishing through ice to extreme depths, he attempts to reel in this monster before the full fury of an Arctic storm hits.

When a snorkeler is impaled & killed by an unseen underwater assailant in the waters surrounding the island of Sulawesi in Indonesia, Jeremy Wade travels to the islands to investigate a spate of similar attacks across the region.

On a volcanic Pacific island, an ancient fishing community is being terrorized by something unknown in the water that’s been leaving behind mysterious puncture wounds on its victims. Can Wade uncover the identity of this fanged assailant?

When two men mysteriously vanish on a remote lake in Malaysia, Wade sets out to track down the possible killer. Amid rumors of a giant fish on the loose, he follows the evidence into the last stronghold of an old adversary: the one river monster that he’s failed to catch.