's 2010 science fiction action film Inception was a commercial blockbuster, making back over five times its $160 million budget at the box office. It is also an enduring pop-culture reference point, parodied in episodes of South Park and Rick and Morty, and has even been recognised as the source of a neologism, with the suffix '-ception' becoming shorthand for the film's multi-layered plot. It remains one of the most memorable action films of the century due to the unorthodox setting of its heist plotline in the minds and dreams of its characters rather than in the film's real world, an aspect which has been more reverently carried by later television series such as Sherlock and Legion. As influential as it has become in contemporary culture, however, Inception is not the originator of this trope. Consciously or not, Nolan's film enters into a thematic tradition which had existed in Anglophone science fiction for over half a century before 2010. The trope of rendering a person's mind as a physical 'inner space' or landscape which can be explored
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