You will Watch G.I. Joe Sigma Six Episode 9 online for free episodes with HQ / high quality. Stream cartoons G.I. Joe Sigma Six Episode 9 Polar 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.