Picturehouse Central are showing this sci-fi classic in 70mm. The film is also being screened on May 7th and 11th and you can find all the details here.
Time Out review:
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.
Here (and above) is the (brilliant) trailer.