Davros (/ˈdævrɒs/) is a fictional character from the long-running British science fiction television series Doctor Who. He was created by screenwriter Terry Nation, originally for the 1975 serial Genesis of the Daleks. Davros is a major enemy of the series' protagonist, the Doctor, and is the creator of the Doctor's deadliest enemies, the Daleks. Davros is a genius who has mastered many areas of science, but also a megalomaniac who believes that through his creations he can become the supreme being and ruler of the Universe. The character has been compared to the infamous dictator Adolf Hitler several times, including by the actor Terry Molloy, while Julian Bleach defined him as a cross between Hitler and the renowned scientist Stephen Hawking.

Davros is from the planet Skaro, whose people, the Kaleds, were engaged in a bitter thousand-year war of attrition with their enemies, the Thals. He is horribly scarred and disabled, a condition that various spin-off media attribute to his laboratory being attacked by a Thal shell. He has one functioning hand and one cybernetic eye mounted on his forehead to take the place of his real eyes, which he is not able to open for long; for much of his existence he depends completely upon a self-designed mobile life-support chair in place of his lower body. It would become an obvious inspiration for his eventual design of the Dalek. The lower half of his body is absent and he is physically incapable of leaving the chair for more than a few minutes without dying. Davros' voice, like those of the Daleks, is electronically distorted. His manner of speech is generally soft and contemplative, but when angered or excited he is prone to ranting outbursts that resemble the hysterical, staccatissimo speech of the Daleks.

Davros first appeared in the 1975 serial Genesis of the Daleks, written by Terry Nation. Nation, creator of the Dalek concept, had deliberately modelled elements of the Daleks' character on Nazi ideology, and conceived of their creator as a scientist with strong fascist tendencies. The physical appearance of Davros was developed by visual effects designer Peter Day and sculptor John Friedlander, who based Davros' chair on the lower half of a Dalek. Producer Philip Hinchcliffe told Friedlander to consider a design similar to the Mekon from the Eagle comic Dan Dare, with a large dome-like head and a withered body.

Cast in the role of Davros was Michael Wisher, who had previously appeared in several different roles on Doctor Who and had provided Dalek voices in the serials Frontier in Space, Planet of the Daleks and Death to the Daleks. Wisher based his performance as Davros on the philosopher Bertrand Russell. In order to prepare for filming under the heavy mask, Wisher rehearsed wearing a paper bag over his head. Friedlander's mask was cast in hard latex, with only the mouth revealing Wisher's features; make-up artist Sylvia James shaded the mask's tones and blackened Wisher's lips and teeth to hide the transition.

In the serial Destiny of the Daleks, Davros is played by David Gooderson using the mask Friedlander made for Wisher after it was split into intersecting sections to get as good a fit as possible. When Terry Molloy took over the role in Resurrection of the Daleks, a new mask was designed by Stan Mitchell.

In 2023, Julian Bleach, who played the character in four episodes of the revived series, reprised the role of Davros for a minisode aired during Children in Need, informally titled "Destination: Skaro", in which Davros is depicted as non-disabled and without scarring. In an interview for Doctor Who: Unleashed, executive producer Russell T. Davies said that this is how Davros will be depicted in future appearances, to avoid contributing to harmful tropes of disabled villains in media.

"We had long conversations about bringing Davros back, because he's a fantastic character, [but] time and society and culture and taste has moved on. And there's a problem with the Davros of old in that he's a wheelchair user, who is evil. And I had problems with that. And a lot of us on the production team had problems with that, of associating disability with evil. And trust me, there's a very long tradition of this.

"I'm not blaming people in the past at all, but the world changes and when the world changes, Doctor Who has to change as well.