Tesis (Thesis) is a 1996 Spanish film. The feature debut of director Alejandro Amenábar, and written by him and Mateo Gil, it won seven 1997 Goya Awards, including the award for Best Film. It stars Ana Torrent , Fele Martínez and Eduardo Noriega .

Ángela (Torrent) is a film student at university in Madrid. Searching for source material for a paper on violence in film, she cultivates the friendship of Chema (Martínez), a fellow student with an encyclopaedic collection of violent and pornographic films. After her professor dies while watching a film she steals the videotape, discovering that it is a snuff film featuring a girl who she and Chema recognize as another student at the university. Investigating the origins of the tape, they are drawn into the operations of a chilling snuff ring.