This article argues that scholarship on law and technology is a thoroughly speculative activity. The textual signifiers of this speculative orientation are the multiple incursions of science fiction that locate and justify lawyers writing about technology. Through a detailed examination of three law and technology literatures - on early space technology, IVF and virtual worlds - it will be shown that science fiction is the storehouse of images and imaginings that substantiate the legal projection of technological futures. When law confronts technology, science fiction is its speculative jurisdiction. The suggestion is that through a more through-going engagement with science fiction as the speculative jurisdiction, law could engage more adequately with the complexities and contingencies of technological change.