In every corner of the world, dogs form meaningful partnerships with people, working together in times of trouble, solving problems, and helping us conquer our greatest fears. In this episode we meet extraordinary dogs as they lend a paw to those in need, including a Golden Retriever that helps a U.S. veteran ease her PTSD issues through surfing, a search and rescue team that responds to major disasters at a moment's notice, and a Chocolate Labrador that boosts young students' self-esteem at a school in the U.K.

Dogs have a natural instinct to love, nurture, and protect and when it comes to caring for people, watching over wildlife, or defending endangered species, these four-legged guardians are eager to lend a paw! In this episode, we meet Gracie, a Border Collie who protects humans from wild animals and wild animals from humans at Glacier National Park, then travel to Kenya, where Diego, a Belgian Malinois, guards the rhinos at Ol Pejeta Conservancy. We also travel to Philadelphia, where a Labrador named Iris helps the visually impaired go jogging.

Dogs are born with an incredible sense of smell, and sometimes, we call upon these superpowers to help prevent ecological disasters, prevent the decline of endangered animals, and even sniff out a rare culinary delicacy. Join us as we follow canine detectives on the Canadian frontier working to the stop the advance of invasive zebra mussels, on the Western Cape to rescue geometric tortoises, and into the private woods of Washington to track down an aromatic fruiting fungus that's more expensive than gold: truffles.