The new episode "Elephant" takes viewers to Amboseli National Park in Kenya, where a once-thriving family of pachyderms is struggling to keep their calves alive in the wake of their matriarch's recent death. A new leader may be about to emerge in the form of a pregnant female called Angelina, especially after she gives birth to twins, an extraordinarily rare occurrence among elephants. While that may seem like cause for celebration, however, the odds that Angelina and her family can keep both new arrivals alive are slim.