Thought-Provoking Sci-Fi

Rating: 9/10 (20 December 1999)

Although time travel is a frequently-used gimmick in science fiction films, this is one of the few films that deals with the essential paradox at the heart of the time-travel concept: if you go back in time and murder your grandfather, then you will never be born, and therefore you will never go back in time, so your grandfather won't be murdered after all, so you will be born, so...
In this film, Bruce Willis is sent back in time from the 21st century by the handful of survivors of the ecological holocaust which destroyed life on earth in 1995. The plot is both suspenseful and thought-provoking, as Willis's efforts to prevent the disaster run up against the time-travel paradox...