Horizon: Not only is a kilometre-wide asteroid due to collide with the earth in 2880, but many believe others may be orbiting in space and could strike at any time. Using state-of-the-art graphics and interviews with astronomers, this programme examines how scientists are striving to devise ways of averting catastrophe, and reveals the already existing secret technology that could one day be used to save the planet.

Starring:

Bernard Hill, Jack Fortune

Genre:

Documentary