Today's episode shows us how a wolf pack lives from the birth of the pups until they leave the den. The wolf cubs grow rapidly and change color, from completely black to more brownish tones. Félix Rodríguez de la Fuente shows us how these tender pups prepare for their lives as great hunters. There is great tension between two of the greatest hunters of our wildlife, the golden eagle and the wolf, and this forms the plot of this episode dedicated to the family clan of the Iberian wolf.