Horizon looks at dark energy - the mysterious force that is unexpectedly causing the universe's expansion to speed up. The effects of dark energy were discovered in 1998 but physicists still don't know what it is. Worse, its very existence calls into question Albert Einstein's general theory of relativity - the cornerstone of modern physics. The hunt for the identity of dark en...
A teenager who stops off to see his dealer to test a new drug before heading off for a night of partying. On the way home, he picks up an injured woman and the night takes a surreal tur