You will Watch G.I. Joe Sigma Six Episode 13 online for free episodes with HQ / high quality. Stream cartoons G.I. Joe Sigma Six Episode 13 Operation: Zeus (Part 2) 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?