Flying saucer Flying saucers were a form of disc - shaped spacecraft used by many species throughout the universe for many millennia . On pre - first contact Earth , it was often used as a general term for alien spacecraft , much the same way the term Martian was used for any kind of alien . In this usage , it was more or less interchangable with the term UFO . By the year 2400 , flying saucers were considered a myth of the 20th century . ( COMIC : " Invasion of the Daleks " ) Dalek flying saucers . The Dalek s made extensive use of flying saucers of several types . During the 22nd century Dalek invasion of Earth , they used of saucers for planetary transport . ( TV : " The Dalek Invasion of Earth " ) During the Last Great Time War , the Daleks ' fleet consisted of about ten million flying saucers , including the Dalek Emperor ' s flagship . ( TV : " Dalek " , " The Parting of the Ways " ) Dominator flying saucers . The Dominator s also made use of flying saucers , which were powered by negative mass flux absorption . These ships could absorb radiation and convert it into propulsion . ( TV : " The Dominators " ) Cyberman flying saucers . The Cybermen used a saucer - shaped landing craft when landing on the Moon in 2070 . ( TV : " The Moonbase " ) Adiposian nursery ships . The Adipose used nursery ship s to carry young Adipose from the planet on which they were seeded to the Adipose homeworld . These ships were large enough to carry several million Adipose and were equipped with levitation beam s to transport the Adipose safely surface into the craft . ( TV : " Partners in Crime " ) Jathaa sungliders . These saucer - like crafts , apparently capable of interstellar travel and possessing powerful weapon systems , seemed to be the main mode of transportation for the Jathaa when visiting Earth . ( TV : " Army of Ghosts " , TV : " End of Days " ) . Nedenah flying saucers . The Nedenah were a species of explorers that frequently visited Earth using flying saucers . These were large , featureless , pale - coloured discs . They could move thirty times the speed of sound , stop in a second and were highly manoeuvrable . Though they were opaque and windowless , the Nedenah would navigate by the ship telepathically , beaming the view from outside . The hull could be shed if it was damaged , leaving an undamaged hull underneath . ( PROSE : " The Devil Goblins from Neptune " ) One of their crafts crashed near Roswell in 1947 and was salvaged by the United States Army , who reversed engineered many technologies from it . ( PROSE : " The Devil Goblins from Neptune " ) Krillitane craft . During the 2007 Krillitane infiltration of Deffry Vale High School in London , saucer - like craft were spotted in the area . ( TV : " School Reunion " ) Foo Fighters . In 1945 , the Doctor witnessed a jellyfish - like saucer craft he said was the source of the Foo Fighter rumours amongst air force pilots of the time . ( PROSE : " Atom Bomb Blues " ) King Hydroflax . In 5343 , the Twelfth Doctor was tasked by River Song with operating on King Hydroflax aboard his flying saucer , which crashed on Mendorax Dellora . ( TV : " The Husbands of River Song " ) Behind the scenes . Flying saucers " are " the stereotypical alien spaceship in the real world . They were first reported in June 1947 ( and had a history of similar forms recorded in tapestries and paintings ) and have appeared in science fiction and alleged real world sightings since .