Air date: 2019-05-28

Runtime: 58 min

The rocky planets Mercury, Venus, Earth, and Mars were born at the same time from the same material - yet have lived radically different lives. What immense forces are at play?

Air date: 2019-06-04

Runtime: 58 min

Professor Brian Cox continues his tour of the solar system revealing that it was once home to not one, but two blue planets.

Air date: 2019-06-11

Runtime: 58 min

Brian Cox continues his exploration of the solar system with a visit to a planet that dwarfs all the others: Jupiter. Its size gives it a great power that it has used to manipulate the other planets.

Air date: 2019-06-18

Runtime: 58 min

Professor Brian Cox reveals the history of Saturn. Saturn began life as a strange planet of rock and ice and in time transformed into a gas giant, ring-less and similar looking to its rival, Jupiter.

Air date: 2019-06-25

Runtime: 58 min

In the final episode, Professor Brian Cox journeys to the remotest part of the solar system, a place that the most mysterious planets call home.