Science documentary which examines the workings of the solar system. This fifth season examines whether time travel is actually possible, the deadly world of asteroids and the threat they pose to Earth, and the phenomena of solar eclipses. The episodes are: '7 Wonders of the Solar System', 'Mars: The New Evidence', 'Magnetic Storm', 'Time Travel', 'Secrets of the Space Probes', 'Asteroid Attack', 'Total Eclipse' and 'Dark Future of the Sun'.