A commercial spaceflight company makes an announcement. The choice over who’ll command the Mars mission leads to a shift in personnel.

The 126 crew responds to a military tank on the loose in downtown Austin and a human pile-up at the roller derby. Meanwhile, new paramedic captain, Tommy Vega, joins the…

A young Jack makes a decision that will impact the course of his life.

A young Jack makes a decision that will impact the course of his life.

Jack visits Ohio.

Jack visits Ohio.