Some of New Zealand's most memorable screen images have come from the genre of science fiction: man alone Bruno Lawrence wandering onto Eden Park in a nightie; giant slugs living under Rangitoto. From alien hunters to futuristic fuel wars to nuclear volcanoes, this collection is a showcase of film and TV which has imagined "what if?" versions of life in the shaky isles. Plus sci-fi nut Greg Broadmore offers his take on Kiwi science fiction, and author Maurice Gee and former NZ On Screen editor Paul Stanley Ward look back on classic sci-fi tale Under the Mountain.