Watch Sonic Underground - Series 1 - Episode 35 Online Free
The Hedgehogs vacation is interrupted by the news of Robotnik's latest weapon. Sonic, Manic and Sonia must travel to the arctic where the weapon is located. They are shocked as the submarine melts the icy landscape from under their feet. The Hedgehogs then scurry to locate the lethal submarine before the entire planet is completely submerged underwater.
