"Take One Giant Step -- Backward!" Part 3 of 9. Guest-starring Captain Marvel. Script by Roy Thomas. Pencils and Inks by Sal Buscema. Cover by Sal Buscema. Near the Arctic Circle, Ronan the Accuser implements the Kree's sinister plan to de-evolve mankind back to the stone age! And only the Mighty Avengers stand in his way! So the battle lines are drawn to save the planet: Captain Marvel, Goliath, Quicksilver, Rick Jones, the Scarlet Witch, and the Vision vs. Sentry 459 and Ronan! But amid the life and death struggle at the top of the world, could love somehow blossom in the ranks of Earth's Mightiest? An outstanding issue!