"In space, no one can hear you scream." This terrifying and unforgettable tagline has been engraved in the minds of audiences since 1979, the year Ridley Scott, along with writers Dan O'Bannon and Ronald Shusett released Alien. Since then, Alien has become a Sci-Fi titan, matched only by franchises such as Star Wars or Star Trek. On a voyage in space, the crew of the ship Nostromo discover a signal coming from a distant planet. Upon investigation, a horrifying life form enters the spaceship. Isolated in the dark depths of the galaxy, the crew must wipe out the creature before it wipes out them. The first thing of note about this Sci-Fi horror classic is the titular character: The Alien. Designed by Swiss designer H.R. Giger, the Xenomorph is one of the scariest aliens ever to grace the silver screen. Although it is a guy in a suit, the film is shot to counteract this by only showing the creature partially. This leaves the horror to the viewer's imagination, which has enhanced the fear the Alien strikes. The setting of deep space portrays a sense of isolation, further increasing the suspense. Alien is essentially a 70's rendition of B-movies of the 50's, and the cast of unknown actors at the time is evidence of this. Ellen Ripley, played by Sigourney Weaver, has become one of the most recognisable female characters in all of cinema. Other important actors are Ian Holm, Tom Skerritt and John Hurt, who is in what many consider to be one of the most memorable scenes in history - the Chestburster scene. All the crew give amazing performances (even the cat, Jonesy). The soundtrack, although not much of it, is brilliant too. I personally love the theme of the original Alien. The eerie atmosphere of the movie is perfectly simulated by the slow and deep sound of a trumpet. The success of Alien would go on to create a franchise, including an amazing sequel and a crossover with another influential movie creature, the Predator. Even today, new instalments to the series are being added, whether they be prequels, games or comics. The Xenomorph's first outing however, will always be remembered as a crucial turning point in modern science-fiction cinema.