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.

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?

On a volcanic island in the Pacific, a fishing community is terrorized by something in the water that's left behind a trail of bloodied victims. The only clue to the attacker's identity is the puncture wound it's left behind.

After two men vanish from a remote lake in Malaysia, Jeremy Wade sets out to track down the possible culprit. A trail of evidence leads Jeremy into an ancient rainforest, where an old adversary lies in wait.

In this special episode, Jeremy reveals brand-new personal insights and untold stories behind the most epic and challenging adventures of his River Monsters career.

Paul Watson is captain of Sea Shepherd, a radical environmental group made up of self-proclaimed eco-pirates who fight for marine conservation. Their mission is to stop Japanese fishing vessels from killing whales in Antarctica.

Sea Shepherds finally spot a Japanese whaling ship, the harpoon vessel Yushin Maru #2. Captain Paul Watson devises a dangerous plan for two of his crew members to board the Yushin fleet and deliver a letter telling them to stop the killing of whales.

With Ben & Giles of Sea Shepherd being held hostage aboard the Japanese whaling ship Yushin Maru #2, Captain Paul Watson is pleased at the international media storm he's created & rejects an offer from whalers to release the hostages.

After three long days, Pottsy and Giles are transferred back from the Yushin Maru and become instant celebrities with the media. Just as they are settling back in, the crew discovers that an unknown ship has been following them!

The ship's engineer reports that one of two engines is broken. Now they will be unable to keep up with the Japanese whalers and are forced to return to Melbourne for repairs. While heading back, they have to navigate through a massive oceanic storm.

Armed with new volunteers, the Sea Shepherds head out to sea to find the Japanese whaling ships. After they pinpoint the fleet's location, the Captain raises the stakes and plans for another boarding. This time it will be an all-female boarding team!

The Sea Shepherds have finally found the most important ship in the Japanese whaling fleet, the Nisshin Maru factory ship. Everything has led to this moment and despite warnings from the Japanese whalers, the Sea Shepherds strike.

The Sea Shepherd Conservation Society volunteers head to Antarctica for their most intense anti-whaling campaign yet. No sooner does the ship leave port than the ship's Gyro breaks and they hit a massive storm the size of Australia.

A huge weather system moves in and the ship is forced to take shelter behind a large iceberg. They are surrounded by ice so thick they can no longer move and it threatens to severely damage the ship.

The Sea Shepherd volunteers gather intel on the Japanese fleet's location and realize that they are low on fuel. Then, they come across the entire Japanese fleet searching for one of their crew members who has fallen overboard.

The Sea Shepherd finds the Japanese fleet searching for a crew member that fell overboard. The Captain orders his crew to head back to port. There, a stranger hands the captain a letter filled with a mysterious white powder.