Plot: Another of the spectacular BBC series The Great Spectacle of Nature is the documentary of the fourth episode of Superquark, which takes us along the coasts of Alaska, when the sun returns to warm the earth and the water becomes an enormous pantry, full of food: it is the Time of Abundance. Humpback whales, with their calves, arrive here from as far away as Hawaii, but the price to pay is the very dangerous presence of hungry killer whale