Sean Pertwee narrates this documentary exploring the passions and intrigues - from families torn asunder to jealous plots and sibling rivalries - that drive members of the world's largest wolf pack, living in Yellowstone National Park.

With a ten-foot wingspan, the Andean Condor is nature's most accomplished glider, soaring unchallenged in the cold mountain air. This is the story of a British hang-gliding expedition that attempts to fly with condors in the Patagonia Andes.

It's a perilous place to hang-glide, even for world champion glider Judy Leden.