###Answer the question from the input provided. Please answer from input only.

###Input: The companion figure – generally a human – has been a constant feature in Doctor Who since the programme's inception in 1963. One of the roles of the companion is to remind the Doctor of his "moral duty". The Doctor's first companions seen on screen were his granddaughter Susan Foreman (Carole Ann Ford) and her teachers Barbara Wright (Jacqueline Hill) and Ian Chesterton (William Russell). These characters were intended to act as audience surrogates, through which the audience would discover information about the Doctor who was to act as a mysterious father figure. The only story from the original series in which the Doctor travels alone is The Deadly Assassin. Notable companions from the earlier series included Romana (Mary Tamm and Lalla Ward), a Time Lady; Sarah Jane Smith (Elisabeth Sladen); and Jo Grant (Katy Manning). Dramatically, these characters provide a figure with whom the audience can identify, and serve to further the story by requesting exposition from the Doctor and manufacturing peril for the Doctor to resolve. The Doctor regularly gains new companions and loses old ones; sometimes they return home or find new causes — or loves — on worlds they have visited. Some have died during the course of the series. Companions are usually human, or humanoid aliens.

Since the 2005 revival, the Doctor generally travels with a primary female companion, who occupies a larger narrative role. Steven Moffat described the companion as the main character of the show, as the story begins anew with each companion and she undergoes more change than the Doctor. The primary companions of the Ninth and Tenth Doctors were Rose Tyler (Billie Piper), Martha Jones (Freema Agyeman), and Donna Noble (Catherine Tate) with Mickey Smith (Noel Clarke) and Jack Harkness (John Barrowman) recurring as secondary companion figures. The Eleventh Doctor became the first to travel with a married couple, Amy Pond (Karen Gillan) and Rory Williams (Arthur Darvill), whilst out-of-sync meetings with River Song (Alex Kingston) and Clara Oswald (Jenna Coleman) provided ongoing story arcs. The tenth series will introduce Pearl Mackie as Bill, the Doctor's newest traveling companion.

With the show's 2005 revival, executive producer Russell T Davies stated his intention to reintroduce classic icons of Doctor Who one step at a time: the Autons with the Nestene Consciousness and Daleks in series 1, Cybermen in series 2, the Macra and the Master in series 3, the Sontarans and Davros in series 4, and the Time Lords (Rassilon) in the 2009–10 Specials. Davies' successor, Steven Moffat, has continued the trend by reviving the Silurians in series 5, Cybermats in series 6, the Great Intelligence and the Ice Warriors in Series 7, and Zygons in the 50th Anniversary Special. Since its 2005 return, the series has also introduced new recurring aliens: Slitheen (Raxacoricofallapatorian), Ood, Judoon, Weeping Angels and the Silence.

The Dalek race, which first appeared in the show's second serial in 1963, are Doctor Who's oldest villains. The Daleks are Kaleds from the planet Skaro, mutated by the scientist Davros and housed in mechanical armour shells for mobility. The actual creatures resemble octopi with large, pronounced brains. Their armour shells have a single eye-stalk, a sink-plunger-like device that serves the purpose of a hand, and a directed-energy weapon. Their main weakness is their eyestalk; attacks upon them using various weapons can blind a Dalek, making it go mad. Their chief role in the series plot, as they frequently remark in their instantly recognisable metallic voices, is to "exterminate" all non-Dalek beings. They even attack the Time Lords in the Time War, as shown during the 50th Anniversary of the show. They continue to be a recurring 'monster' within the Doctor Who franchise, their most recent appearances being in the 2015 episodes "The Witch's Familiar" and "Hell Bent". Davros has also been a recurring figure since his debut in Genesis of the Daleks, although played by several different actors.

The Master is the Doctor's archenemy, a renegade Time Lord who desires to rule the universe. Conceived as "Professor Moriarty to the Doctor's Sherlock Holmes", the character first appeared in 1971. As with the Doctor, the role has been portrayed by several actors, since the Master is a Time Lord as well and able to regenerate; the first of these actors was Roger Delgado, who continued in the role until his death in 1973. The Master was briefly played by Peter Pratt and Geoffrey Beevers until Anthony Ainley took over and continued to play the character until Doctor Who's hiatus in 1989. The Master returned in the 1996 television movie of Doctor Who, and was played by American actor Eric Roberts.



###Question: Who are the oldest villains from the Doctor Who series? 

###Answer: {'answer':'The Dalek race'}