Lifeforce (1985) dir. Tobe Hooper

Space vampires are unwittingly brought back from space to wreak havoc on earth.  One of the great underrated scifi horror films of the 80s.  The film is grand in scope from the phenomenal music by Henry Mancini to the onslaught of special effects, the film works up a breakneck pace that leaves one breathless at the end.  Lifeforce is AWESOME.