Plot: Superquark opens the third episode with the great thaw of the Arctic, that immense expanse of ice that in the long winter remains in the dark and freezing, almost as if it were another planet and in the summer, slowly, loses its mantle of ice, the sun is almost always on the horizon, and whales, belugas, foxes, lemmings and large flocks of birds return to swimming, running, flying. Only for the masters of the ice, the polar bears, this is a delicate moment