The Season 1 finale focuses on marine mammals. In New Zealand, the mating behaviors of dusky dolphins are explored. Also: how whales find mates in the ocean vastness. Included: a dolphin birth; and the difficulties of breastfeeding underwater.
The reproductive secrets of marsupials are examined. Included: the gravity-defying mating of koalas; a baby kangaroo's first steps; and a fostering program for rock wallabies. Also: a dissection of a kangaroo reveals its unique reproductive anatomy.