Clunes embarks on a journey of discovery that takes him to Africa, Australia, and the Rockies to discover the surviving wild ancestors of his own pampered pets.

Clunes investigates how the relationship between humans and dogs has benefitted each species.

Clunes goes in search of a creature that has long fascinated him: the magnificent manta ray. He travels to a remote island in the Indian Ocean where dozens of these mysterious, elusive, and gentle giants of the ocean gather once a year.

Martin begins his journey in Nepal, where the cow is sacred, and ownership symbolizes wealth, strength and abundance.

Martin looks at how pet ownership in Japan is scaling new heights. For many years there have been more dogs and cats than children.

Cornered on a paradise island, lemurs are unique to Madagascar but are dying. Clunes visits the island to learn more about these endangered creatures including the Greater Bamboo Lemur.

Some horses are bred for speed, some for leisure, and some like Clunes's own two Clydesdales for work. Clunes visits horses all over the world as part of the Budweiser Clydesdales.

Clunes joins a mission to make wildlife history by returning endangered lions to Kora National Park, the Kenyan nature reserve of Born Free fame.