Ideally, science fiction films require large quantities of cash.

Truckloads of the stuff.

Just look at the most famous examples of the genre:Metropolis,Blade Runner,2001: A Space Odyssey.

In 1974, however, he directed his one and only big screen feature,Phase IV.

Barely released in US cinemas and allowed to quietly languish in obscurity on DVD,Cypheris well worth rediscovering.

(By contrast,Videodrome, Cronenbergs more expensive next film, only made $2 million.)

Scannersis hardly Cronenbergs most mature work, but its nevertheless an unforgettable one.

Invaders From Mars faults are legion and glaring.

Nevertheless, Menzies film is filled with eerily beautiful images that still evoke a little shiver.

Shot in stark black-and-white, Aronofskys unique film is a tightly wound coil of anxiety and confusion.

A rare, classic foray into sci-fi from Hammer Films.

Its Rockwells performance, however, that isMoons biggest triumph, and was more than deserving of an Oscar.

Honourable mentions:Silent Running,Fortress,Alphaville,Timecrimes,It Came From Outer Space