The Jo's storm COBRA Castle! Cobra hits the GIJoe team on two fronts—at the North Pole and in the Amazon! The Joes fight off hordes of new-style BATs and deploy some new hardware of their own. The Amazon supply depot is destroyed and Duke is nearly killed by Destro’s arctic trap! Duke decides that it’s time for a change in tactics. If COBRA is to be defeated, the team has to go “off the grid”.

After hacking into the Sigma 6 computer and infecting it with a virus, COBRA sends the Dreadnocks on a rescue mission to free their leader, Cobra Commander.

Meanwhile, Duke visits General Hawk in the hospital, and Hawk's son, Scott Abernathy, draws some unwanted attention after hacking into COBRA's computer in an attempt to perfect an A.I. system he's been working on.

With Cobra Commander back in charge, COBRA launches an all-out assault on the Joe's headquarters. Meanwhile, Scott Abernathy and his robot dog Spud are relentlessly pursued by the sinister android Overlord Vector.

SNAKE EYES vs. STORM SHADOW!! The ninja brothers duel it out as Snake Eyes tries to rescue Scott. The rest of the JO's try to stop COBRA's new plan: COBRA Coast, even after the destruction of their HQ!

COBRA Coast Climax! Duke, Scott, and the other Joe's race the clock! They have 30 minutes to disarm and destroy a plasma canon or COBRA will be victorious! It's Scarlett vs. Baroness, Heavy Duty and Tunnel Rat vs. Destro, and Duke vs. Cobra Commander! Will they stop the doomsday weapon in time?

It's a race between Baroness and the Joes for a stone of power! When the main Joe team gets ito trouble, it's up to Long Range, Spirit, and Snake Eyes to take up the fight!

The Power Stones are revealed! It seems that there are mysterious natural stones that have amazing technological powers that both Cobra and GI Joe are on the hunt for. In this episode, Zartan finds a Power Stone in the deep jungle and it's up to Spirit and Snake Eyes to team up to stop the evil master of disguise!

Duke and the Sigma Six team must get to the Antarctic to infiltrate Cobra's ice fortress. As Duke climbs perilous ice mountains to break into the fortress, the rest of the Joe team are fighting their way through legions of Cobra BATS with the Sigma Six Ice Saber vehicles.

It's Ninja versus Ninja in this episode. A Power Stone is discovered in a temple on Mount Arashikage and Storm Shadow goes to collect. A massive battle ensues as Snake Eyes takes on his sworn enemy and blood brother Storm Shadow for possession of the Stone. Meanwhile, Jinx and Kamakura show the Dreadnaughts that it's not good to tangle with a deadly dup of Ninjas!

While Scott and his pals are visiting a Rocket Base, Cobra takes over and plans on sending a massive rocket into space to wreak havoc on the Earth. Heavy Duty must sneak in, and help out the kids. With Tunnel Rat, Scarlett and Duke on the scene as well, the Cobra Forces abandon their plans.

The final battle! In the first part of this exciting two-part episode the COBRA forces begin to create their ultimate weapon of destruction, utilizing the power Stones - The ZEUS Device! A giant mech of unstoppable power, this mechanical monster spells certain doom for the Gi Joe Sigma Six team!

In part two, the GI Joe Sigma Six team must come together and use their amazing gear and incredible skills to not only defeat and deactivate the rampaging ZEUS mech, but also to stop COBRA's other plans at all costs! With seconds on the clock, can the inestimable GI Joe Sigma Six team save the day?