Brian believes we are at the start of a new age of space travel, where space flight is on the verge of becoming routine. In this episode, he explores the latest science and takes a new look at his old films and asks: how far can we go in our exploration of the cosmos?

Brian Cox looks at our attempts to answer one of the most profound questions we can ask – are we alone in the universe? In this film, he explains why this search should be taken seriously.

Brian takes a fresh look at the concept of gravity, revealing it to be far more than just the force that makes things fall to the ground.