Countdown: Inspiration4 Mission to Space Limited Series: Episode Guide & Ratings

Preparations begin for the mission to send four civilians into orbit, and its charitable goals lead to a 29-year-old cancer survivor joining the crew.

Principles of generosity and prosperity inform the selection of the last two crew members. Excitement for the flight ramps up, but anxiety lingers.

As training begins, the crewmembers process the physical, mental and technical demands being placed on them. A climb of Mt. Rainier puts them to the test.

A fighter jet ride prepares the crew for the G-forces of spaceflight. Hayley, Sian and Chris relate the emotions they experience as launch approaches.