Astronaut Sam Bell has a quintessentially personal encounter toward the end of his three-year stint on the Moon, where he, working alongside his computer, GERTY, sends back to Earth parcels of a resource that has helped diminish our planet's power problems.

Silent Running

In a future where all flora is extinct on Earth, an astronaut is given orders to destroy the last of Earth's plant life being kept in a greenhouse on board a spacecraft. Following the screening in November 2011, four experts gave their responses to the film which can be accessed via the right-hand menu.