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The first film in the 'Alien' series, directed by Ridley Scott, premiered in 1979 with the title 'Alien - the 8th Passenger'. It carries the ironic tagline 'In space, no-one can hear you scream. All four films in the series have different directors, of which David Fincher and James Cameron. Sigourney Weaver, who plays Ripley, is the only actor to have been in all four films. 'Alien' was part of 19070s-1980s trend to focus on extraterrestrial life. 'Close Encounters of the Third Kind' and 'E.T.' were other examples.