Aliens

Sigourney Weaver returns as Ripley, the only survivor from the first grisly encounter with the slimy she-creature, here joining a team of high-tech marines to investigate the mysterious dispappearance of another colonialist crew.

Unlike so many sequels, this film doesn't copy the formula of its predecessor and hence succeeds on its own merits. Much more action than ALIEN, but no less thrills.