UFOs: Past, Present, and Future is a 1974 documentary film that examines several prominent UFO sightings from the post-war to contemporary era. It was re-released in 1976 and 1979 under the title UFOs: It Has Begun to coincide with renewed interest in the subject due to the release of Steven Spielberg's Close Encounters of the Third Kind. It is based on the book UFOs: Past, Present, and Future by Robert Emenegger.

UFO is a 1956 American semi-documentary about the development of the UFO phenomenon in the United States. Clips from the documentary have often been used in other UFO documentaries and television episodes related to UFOs.