Mark Kermode's Secrets of Cinema - Season 1 Episode 4 Science Fiction

Mark explores the most visionary of all genres - science fiction, and shows how film-makers have risen to the challenge of making the unbelievable believable. Always at the forefront of cinema technology, science fiction films have used cutting-edge visual effects to transport us to other worlds or into the far future. But as Mark shows, it's not just about the effects.