BBC Two Pets - Wild at Heart (R) (T) Sat 11:00

Pets - Wild at Heart (R) (T)

David Tennant narrates the concluding documentary revealing household animals in a new light, with special photographic techniques showing their hidden senses and secret communication skills. Dogs in Paris use their sense of smell to uncover a very different city, a hamster stages a great escape - then uses its navigational talents to find its way home - and a budgie literally glows as it woos its mate. In Japan, cats display their secret messages, while in Peru, dogs employ hidden signs to communicate across a city.

S01 E02