A massive earthquake hits southern Alaska; the Kilcher family scrambles to recover.

Natural disasters continue their onslaught on Kilcher homestead.

The Kilchers rush to make headway on time-sensitive projects

With Otto's surgery looming, the rush to complete projects becomes urgent.

Otto makes the decision to have potentially life-threatening surgery.

Otto's son Levi comes to Alaska to help lead the cattle drive.

The Kilchers gather for Thanksgiving dinner at the old family barn.

Atz Sr. prepares for a visit from his daughter, singer-songwriter jewel.

Jane trolls for the biggest fish of her life, while the men salvage lumber.

Otto enlists the help of a helicopter to move a massive greenhouse.

The Kilchers celebrate their most unforgettable Christmas ever.

Tensions flare between Otto and August before August leaves for college.

The Kilchers feel the pressure to get jobs done before winter arrives.

Otto pays for his hernia surgery and ends up with gold fever; Jane and Eivin search a remote island for enough deer to last the winter; Atz Lee faces down old fears and reaches new heights as he races the freeze in order to complete his cabin.

The Kilchers look to the future as winter looms; Atz Sr passes on vital survival knowledge; Atz Lee embarks on a risky solo hunt to a remote and dangerous island; Eivin builds the ideal boat for his young family's adventures on the water.

Otto and Charlotte fight to round up their cattle; Atz Lee and Jane come to a decision about his cabin; Eivin and Eve take the new boat on a maiden fishing journey; Shane and Kelli brace for unexpected news about her health.