The Protectors: Dogs have a natural instinct to love, nurture and protect, including this caring pooch who has given its owner a new lease of life by becoming her running mate. (S1, ep 4) [S,AD]
The Partners: Check out some of the most remarkable bonds between man and dog in a special look at incredible human and canine partnerships. (S1, ep 3) [S,AD]
The Lifesavers: Across the world, dogs are saving lives. At a South African airport, bird-chasing border collies are preventing potentially devastating collisions with aircraft. (S1, ep 2) [S,AD]
The Rescuers: Dogs are coming to our rescue in surprising ways, including this Great Dane that has transformed the life of a 13-year-old girl with a life-limiting condition. (S1, ep 1) [S,AD]