The 1950’s was a wonderful boom period in the production of science-fiction films in the United States. This resurgence was shaped by a number of factors - both internal to the film industry and external in the wider fabric of society. The first and perhaps most crucial of these from an economic point of view was the creative dead end that the horror genre had found itself in post World War Two. The genre had largely been shaped by émigré directors under the auspices of Universal studios, but the horrors of war and the genre’s increasing stupidity and self parody opened up new terrain for a hybridised genre that mixed the conventions of horror within a discussion of contemporary technology. It was crucial for the horror genre to continue in some form in this age because of the uncertain political and social climate and the latent fears therein - the conventions of horror were still useful in addressing these anxieties. Hollywood quickly set about reconstituting and exploring these fears in a form that was more acceptable and exciting to an ever growing and affluent teenage audience, and the result was the horror/science-fiction hybrid. I prefer to the view the invasion narratives of the 1950’s as a hybridisation of horror and science-fiction because the removal of the formal attributes of either genre leads to a collapse in the effectiveness of the film.