A twenty mile-in-diameter space vessel has arrived at 22nd-century Earth from its Neptune moon home. It wishes to learn more about the holy home of its Creator, NASA; it seeks its God. Dylan Hunt, Genesis II's "Captain Kirk" type, learns that the last NASA space exploration team, to one of the moons of Neptune sent back a garbled final message about discovering an alien city whose inhabitants were long dead, but whose machinery was still in operation. The space ship now in Earth orbit has zapped one of Dylan's friends, a lady named Harper-Smythe, who suddenly vanished in a blinding flash—only to be returned a short while later—only this is not Harper-Smythe at all, its voice announces, but a perfect machine duplication! Soon the robot is behaving like the real live-girl, having received a "personality imprint." Perhaps Dylan will be able to save the two-hundred hostages the spaceship is holding in orbit by gaining the androids's trust, even affection. They offer it some old 20th-century NASA film; the lovely android responds by smashing the projector with her (its?) fist. This story ends when the android, by now in love with Dylan (who wants the real thing, not a mechanical copy) tricks the intelligent machine-spaceship into releasing the hostages. Android and girl finally swap places again, and the mechanical lady goes on to explain to the machine what happened to NASA during the last two centuries. The machine leaves for places unknown and Dylan's hometown of Pax becomes peaceful once more.
—Susan Sackett & Gene Roddenberry, The Making of Star Trek: The Motion Picture, p.57–8, 1980, Wallaby