Though sixteen-year-old Gardner Elliot has lived his whole life with a team of scientists on Mars, he has always longed to see Earth, to find the father he has never known, and to meet Tulsa, a beautiful street-smart girl he has become friends with online. But when his chance finally comes, doctors discover his heart can't withstand the Earth's atmosphere. Eager to find his father, Gardner and Tulsa escape on a cross-country race against time to unravel...

The dedicated doctors, nurses, and staff of Gaffney Chicago Medical Center are back for the pulse-pounding fourth season. The series continues to chronicle the daily life-and-death battles of Chicago's elite medical professionals as they navigate challenging medical emergencies and intense personal drama. Dr. Will Halstead got down on one knee and proposed to Dr. Natalie Manning, but will the two ever make it down the aisle?

The documentary shows that public lands can be a uniting factor in a divided America, as seen through the efforts of Native tribal organizations in three states to preserve the spaces.

Now college graduates, friends from Tree Hill face the adult world.