The best or the worst of the franchise will depend on your tolerance of utter nonsense.

The black and white inspiration for Ridley Scott's Alien.

Underwhelming big budget sci-fi horror which had potential but never once lived up to its premise.

Disappointing adaptation of an enjoyably icky slice of written sci-fi horror.

The daddy of the atomic insect monster movies of the 1950s, this is the best the genre has to offer.

Killer plants isn't an easy sell in this butchered adaptation of John Wyndham's classic novel.

Synthetic monster goes on a killing rampage in this low budget 1980 creature feature.

Massively underrated sci-fi horror features one of the best 'real' monsters of the 1990s.

British made sci-fi schlock classic isn't a great film by any stretch of the imagination but it's memorable for the right, and wrong, reasons.