The series starts with a dramatic encounter with the Japanese Whaling fleet. The episode then flashes back to the maiden launching and departure of the vessel from homeport three months earlier. Paul Watson and the Sea Shepherds head back down to Antarctica for what promises to be their most intense anti-whaling campaign yet. However, 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 Steve Irwin is forced to take shelter behind a large iceberg. By morning, they are surrounded by ice so thick they can no longer move. The ice begins to push against the aging ship's fragile hull, denting it inwards.

The Sea Shepherd gather intel on the fleet's location, they realize that they are low on fuel. As they weigh whether or not to head back to port, they come across the entire Japanese fleet searching for one of their crewmembers that has fallen overboard.

The Sea Shepherds have come across the entire Japanese fleet searching for one of their crewmembers that fell overboard. Paul orders his crew to stand down, and they agonize over being so close to their target, yet unable to attack.

The Steve Irwin is quarantined in Hobart and the crew anxiously waits to find out if they have been exposed to Anthrax. Finally they get the all clear and 1st mate Peter Brown wastes no time leaving the ship after having quit the campaign.

Captain Watson is in pursuit of the Nisshin Maru when all three Japanese harpoon ships suddenly appear on out of the fog. The Sea Shepherds are completely outnumbered.

As the Sea Shepherds prepare for their fourth straight day of engagement with the Japanese whaling fleet, Andy and Simon argue with Dan over the best strategy for attack.

Low on fuel, the small boats head toward the Steve Irwin, but in order to get them on board safely, Paul must employ a dangerous military strategy, "The Crazy Ivan," circling at a high speed to try and create calm water for the little boats to return.

The Sea Shepherds shock turns to fury when the Japanese fleet pulls a dead whale onto Nisshin Maru for slaughter. Paul Watson instructs the crew to prepare for battle.

Season Finale.The Sea Shepherds continue to attempt to disrupt the whaling fleet's operations. When the Yushin 3 tries to transfer a dead whale to the Nisshin Maru, Captain Watson maneuvers his ship to block the transfer resulting in a full-speed collision.