Muscat: Stephen Cooter, writer and producer of the series The Planets tweeted that @ProfBrianCox in Oman filming the final piece to camera for #ThePlanets Ep2 #TheTwoSisters “There will be Martians.  And the Martians will be us” @BBCTwo @bbcearth @bbcstudios #therewillbemartians #themartainswillbeus #mars #earth.

Professor Brian Cox, Stephen and their crew were in Oman to film The Two Sisters – Earth & Mars, which was aired on 4 June 2019.

In the episode, Professor Cox contrasts the two rocky planets in the habitable zone, looking at how Mars lost its water and atmosphere, in stark contrast to the life-giving oasis of Earth.

First broadcast on BBC Two on Tuesday 28 May 2019, the five-episode series looks at each planet in detail, examining scientific theories and hypothesis about the formation and evolution of the Solar System gained by unmanned missions to the planets.

Cox presents segments to camera from various locations around the world, alongside extensive computer-generated imagery and footage from space missions. The series was created as a partnership between BBC Studios and the Open University.