Saurian

 has several meanings pertinent to the Doctor Who universe and the real world. They are listed below in alphabetical order by the disambiguation term — that is, the bit between the parentheses in a title like Waitress (Vincent and the Doctor).

In-universe

 * Saurian (Beyond the Sun), a species that lived on Ursu (PROSE: Beyond the Sun)
 * Saurian (The Cybermen), a lizard species from Mondas (COMIC: The Cybermen)
 * Saurian (Extinction Event), a dinosaur-kind scientist (COMIC: Extinction Event)
 * Saurian (Placebo Effect), a marsupial species from Sauron (PROSE: Placebo Effect)
 * Saurian (Lords of the Galaxy), a reptilian species at war with Earth (PROSE: Lords of the Galaxy)
 * Saurian (Lords of the Red Planet), a reptilian species from Mars that evolved into the Ice Warriors (AUDIO: Lords of the Red Planet)