Alien is a sci-fi movie from outside the Whoniverse. Toshiko Sato compared the body of a dead soldier with his heart ripped out to scenes and characters from the movie. (TW: Greeks Bearing Gifts)
The Doctor referenced this movie and its sequels whist imprisoned within Area 51. The Viperox Queen and her eggs bore similarities to that of the Alien Queen and her eggs, as seen in the film's sequel Aliens. (DW: Dreamland)
Izzy Sinclair compared being chased by the Daleks and their Contagium to being "an extra in an aliens film". The Doctor wryly agreed. (DWM: Fire and Brimstone)
