In the wake of the huge commercial success of Alien, almost all attention has perversely focused on the provenance of the script (was it a rip-off of It, the Terror from Beyond Space? Of Van Vogt's fiction? Was former John Carpenter collaborator Dan O'Bannon sold out by producers Walter Hill and David Giler's rewrites?). But the limited strengths of its staple sci-fi horrors - crew of commercial spacecraft menaced by stowaway monster - always derived from either the offhand organic/ Freudian resonances of its design or the purely (brilliantly) manipulative editing and pacing of its above-average shock quota. Intimations of a big-budget Dark Star fade early, and notions of Weaver as a Hawksian woman rarely develop beyond her resourceful reaction to jeopardy. At least Scott has no time to dawdle over redundant futuristic effects in the fashion that scuttles his later Blade Runner.