"Science Fiction/Double Feature" is the opening song to the original 1973 musical stage production, The Rocky Horror Show as well as its 1975 film counterpart The Rocky Horror Picture Show, book, music and lyrics by Richard O'Brien, musical arrangements by Richard Hartley. The song is reprised at the end of the show, with lyrics that reflect on the final events of the story.

The Rocky Horror Show is a musical with music, lyrics and book by Richard O'Brien. A humorous tribute to various B movies associated with the science fiction and horror genres from the 1930s to the early 1960s, the musical tells the story of a newly engaged couple getting caught in a storm and coming to the home of a mad transvestite scientist, Dr Frank-N-Furter, unveiling his new creation, Rocky, a sort of Frankenstein-style monster in the form of an artificially made, fully grown, physically perfect muscle man complete "with blond hair and a tan".