S1, E2: With the sun shining and flowers blooming, summer is the season of splendid abundance, and the long hours of daylight make life burst out in a riot of activity. But, as this intriguing nature documentary illustrates, you have to find clever ways to get your share of the good times while they last. From sneaky ring-tailed lemurs to battling ibex, summer is a time when the living is not always easy.