Part 1, Chapter 2

President Kennedy’s assassination is told through newly released tapes.

"Are We Alone?" An eye-popping journey from the moons of Jupiter to a galaxy perhaps not so far, far away in search of alien life. We'll see what aliens might look like, question what it means to be alive, and calculate the odds of making 'contact'.

Hawking explores the question of whether time travel is possible.

Stephen Hawking spans the entire life cycle of the universe.

With winter approaching, the Kilchers pin all their hopes on one hunt.

The entire homestead rushes to prepare for the first storm of the winter.

Family members search for a newborn calf and its mother during a snowstorm.

Desperate for food, the Kilchers struggle to get through a harsh winter.

Spring arrives and the family deals with a rogue hen and hunts for food.

The family battles danger to drive their cattle to the summer pasture.

Atz begins range riding to protect Otto's cattle herd from predators.

The Kilchers call in favors to help build a fence before the high tide.

The Kilchers fish for the hundreds of pounds needed over the winter.

Atz Lee and Eiven travel to "Terrible Island" to hunt deer.