The time seems to be irreversible a priori and man hardly accepts the collapse of the possibilities of the future in the fixity of the past. Science has taken up this powerful issue from the 1930s on the basis of Albert Einstein’s generalised relativity theory. But long before the appearance of quantum physics and hypothetical movements over time or in parallel worlds, the literatures of the imagination of science-fiction and fantastic travelled over time. This imagination, explored in a complementary way by the cinema, is a virtual travel machine in time stories. Science fiction experiments time as a concept: it handles it in every sense to break its irreversibility and try to act on collective or individual destinies. The fantastic delay is marked by an anxiogenic and toxic obsession of the time spent. The myth has its roots in an immemorial, cyclic time. As a symbol of the creativity of the literatures and the cinema of imaginary, time is at the heart of the individual, his subjectivity, his memory and his relationship with the physical world.