An Unearthly Child (sometimes referred to as 100,000 BC) is the first serial of the British science fiction television series Doctor Who. It was first broadcast on BBC TV in four weekly parts from 23 November to 14 December 1963. Scripted by Australian writer Anthony Coburn, the serial introduces William Hartnell as the First Doctor and his original companions: Carole Ann Ford as the Doctor's granddaughter, Susan Foreman, with Jacqueline Hill and William Russell as school teachers Barbara Wright and Ian Chesterton. The first episode deals with Ian and Barbara's discovery of the Doctor and his time-space ship, the TARDIS, in a junkyard in contemporary London, and the remaining episodes are set amid a power struggle between warring Stone Age factions who have lost the secret of making fire.

The show was created to fill a gap between children's and young adult programming. Canadian producer Sydney Newman, recently made Head of Drama at the BBC, was tasked with creating the show, with heavy contributions from Donald Wilson and C. E. Webber. Newman conceived the idea of the TARDIS, as well as the central character of the Doctor. Production was led by Verity Lambert, the BBC drama department's first female producer, and the serial was directed by Waris Hussein. Following several delays, the first episode was recorded in September 1963 on 405-line black and white videotape, but was re-recorded the following month due to several technical and performance errors. Several changes were made to the show's costuming, effects, performances, and scripts throughout production.

The show's launch was overshadowed by the assassination of American President John F. Kennedy the previous day, resulting in a repeat of the first episode the following week. The serial received mixed reviews, and the four episodes attracted an average of six million viewers. Retrospective reviews of the serial are favourable. It later received several print adaptations and home media releases.

At Coal Hill School, teachers Ian Chesterton and Barbara Wright have concerns about pupil Susan Foreman, who has an alien outlook on England. When the teachers visit her address to investigate, they find a police box and hear Susan's voice inside, as an elderly man arrives and refuses to let the teachers into the police box. They force their way in to find Susan inside a technologically advanced control room that is larger than the police box exterior. Susan explains that the object is a time and space machine called the TARDIS and the old man is her grandfather, who reveals that he and his granddaughter are exiles from their own planet. Refusing to let Ian and Barbara leave, he sets the TARDIS in flight and the ship goes through time and space to the Stone Age.

Za, the leader of a primitive Paleolithic tribe, attempts to make fire. A young woman called Hur warns him that if he fails to do so, the stranger called Kal will be made leader. After exiting the TARDIS, the unnamed old man, whom Ian and Barbara refer to as "the Doctor", is ambushed by Kal, when he witnesses him light a match. Kal takes the Doctor back to the tribe and threatens to kill him if he does not make fire; Ian, Barbara and Susan intervene, but the group is imprisoned in a large cave. With the help of Old Mother, who believes that fire will bring death to the tribe, they escape from the settlement but are intercepted and recaptured before reaching the TARDIS. Kal says they will be sacrificed if they do not make fire. While Ian tries to start a fire, Kal enters the cave and attacks Za, but is killed. Ian gives a burning torch to Za, who shows it to the tribe and declares himself leader. Susan notices that placing a skull over a burning torch makes it appear alive; when the tribe enters the cave, they are faced with several burning skulls, and are terrified, allowing the group to flee to the TARDIS and escape through time and space to a silent and unknown forest. Unnoticed by the crew as they leave the ship to investigate, the radiation meter rises to "Danger".

In March 1963, BBC Television's Controller of Programmes Donald Baverstock informed Head of Drama Sydney Newman of a gap in the schedule on Saturday evenings between the sports showcase Grandstand and the pop music programme Juke Box Jury. Baverstock figured that the programme should appeal to three audiences: children who had previously been accustomed to viewing television during the timeslot, the teenage audience of Juke Box Jury, and the adult sports fan audience of Grandstand. Newman decided that a science fiction programme should fill the gap. Head of the Script Department Donald Wilson and writer C.E. Webber contributed heavily to the formatting of the programme, and co-wrote the programme's first format document with Newman; the latter conceived the idea of a time machine larger on the inside than the outside, as well as the central character of the mysterious "Doctor", and the name Doctor Who. Production was initiated several months later and handed to producer Verity Lambert—the BBC's first female producer—and story editor David Whitaker to oversee, after a brief period when the show had been handled by a "caretaker" producer, Rex Tucker.

In Webber's original production documents, the character of the Doctor (referred to as "Dr. Who") was a suspicious and malign character who hated scientists and inventors, and had a secret intention to destroy or nullify the future; Newman rejected this idea, wanting the character to be a father figure. Tucker offered the role of the Doctor to Hugh David; having spent a year working on Knight Errant Limited and not wanting to be tied to another series, David turned down the role. Tucker envisioned a young actor to play the Doctor with aged make-up; however, Lambert favoured an older actor to avoid preparation time and add authenticity to the role. The part was turned down by actors Leslie French, Cyril Cusack, Alan Webb and Geoffrey Bayldon; Cusack and Webb were reluctant to work for a year on a series, while Bayldon wished to avoid another "old man" role. Lambert and director Waris Hussein invited William Hartnell to play the role; after several discussions, Hartnell accepted, viewing it as an opportunity to take his career in a new direction.

The Doctor's companion was originally named Bridget or "Biddy", a 15-year-old girl eager for life. Her teachers were Miss Lola McGovern, a 24-year-old timid woman capable of sudden courage, and Cliff, a "physically perfect, strong and courageous" man. Bridget was renamed Suzan/Suzanne Foreman, later changed to Susan, and writer Anthony Coburn made her the Doctor's granddaughter to avoid any possibility of sexual impropriety implicit in having a young girl travelling with an older man; Newman was reluctant about the idea, as he wanted the character to have human naivety. Miss McGovern later became history teacher Miss Canning, and Susan's birth name briefly became "Findooclare". When the show's bible was written, the two teachers were renamed Ian Chesterton and Barbara Wright. Chesterton was much more violent in earlier drafts of the script. William Russell was chosen to portray Ian, being the only actor considered by Lambert to do so. Tucker held auditions for the roles of Susan and Barbara on 25 June 1963; actresses Christa Bergmann, Anne Castaldini, Maureen Crombie, Heather Fleming, Camilla Hasse, Waveney Lee, Anna Palk and Anneke Wills were all considered for the role of Susan, while Sally Home, Phyllida Law and Penelope Lee were considered for Barbara. Following Tucker's departure from production, Lambert was in talks with actress Jacqueline Lenya to play Susan, but the role was ultimately given to Carole Ann Ford, a 23-year-old who typically played younger roles. Lambert's friend Jacqueline Hill was chosen to play Barbara.

The programme was originally intended to open with a serial entitled The Giants, written by Webber, but was scrapped by June 1963 as the technical requirements of the storyline—which involved the leading characters being drastically reduced in size—were beyond their capabilities, and the story itself lacked the necessary impact for an opener. Due to the lack of scripts ready for production, the untitled second serial from Coburn was moved to first in the running order. The order change necessitated rewriting the opening episode of Coburn's script to include some introductory elements of Webber's script for the first episode of The Giants. Coburn also made several significant original contributions to the opening episode, mostly notably that the Doctor's time machine should resemble a police box, an idea he conceived after seeing a real police box while walking near his office.

The show remained unnamed in April 1963, simply referred to as The Saturday Serial. It was provisionally scheduled to begin recording on 5 July, to be aired on 27 July, but was delayed. A pilot recording was scheduled to begin filming on 19 July; if successful, it could be broadcast on 24 August. Production was later deferred for a further two weeks while scripts were prepared, and the recording on 19 July was rescheduled as a test session for the dematerialisation effect of the TARDIS. The show's initial broadcast date was pushed back to 9 November, with the pilot recording scheduled for 27 September and regular episodes made from 18 October; the broadcast date was soon pushed back to 16 November, due to the BBC's athletics coverage in July pushing subsequent Saturday transmissions back a week, and later to 23 November. The show was granted a budget of £2,300 per episode (equivalent to £60,800 in 2023), with an additional £500 for the construction of the TARDIS (equivalent to £13,200 in 2023).

Tucker was originally selected as the serial's director, but the task was assigned to Hussein following Tucker's departure from production. Some of the pre-filmed inserts for the serial, shot at Ealing Studios in September and October 1963, were directed by Hussein's production assistant Douglas Camfield. The first version of the opening episode was recorded at Lime Grove Studios on the evening of 27 September 1963, following a week of rehearsals. However, the recording was bedevilled with technical errors, including the doors leading into the TARDIS control room failing to close properly. After viewing the episode, Newman ordered that it be mounted again. During the weeks between the two tapings, changes were made to costuming, effects, performances, and scripts. The second attempt at the opening episode was recorded on 18 October, with the following three episodes being recorded weekly from 25 October to 8 November. Recording for the five episodes (including the pilot) cost a total of £13,693, which Lambert noted was within the programme's budget.

Scholar Mark Bould discusses how the serial establishes Doctor Who's socio-political stances in his 2008 essay "Science Fiction Television in the United Kingdom". He writes, "The story represents the separation/reunion, capture/escape, pursuit/evasion that will dominate the next twenty-six years, as well as the programme's consistent advocacy of the BBC's political and social liberalism." He cites Ian and Barbara's attempt to teach a cavewoman kindness, friendship and democracy, writing "a tyrant is not as strong as the whole tribe acting collectively". Scholar John R. Cook reflected in 1999 that the presence of teachers as companions echoes Doctor Who's original educational remit. Malcolm Peltu of New Scientist noted, in 1982, that the serial was set in the Stone Age because the show's original intention was "to bring to life the Earth's history".

Lawrence Miles and Tat Wood argue that the cavemen's focus on fire is meant to stand in for all technology, thus linking the latter three episodes with the questions of generational change raised by the first episode and its focus on suspicion of children, and tying that to a discussion of technological progress, including the nuclear bomb. They also argue that, contrary to the tendency to treat the story as a one-episode introduction to the series followed by "three episodes of running around and escaping" that the piece should be considered as a single, dramatic whole that is "about making four people who barely know one another learn to trust each other".

Episode	Title	Run time	Original air date	UK viewers (millions)	Appreciation Index
1	"An Unearthly Child"	23:24	23 November 1963 (1963-11-23)	4.4	63
2	"The Cave of Skulls"	24:26	30 November 1963 (1963-11-30)	5.9	59
3	"The Forest of Fear"	23:38	7 December 1963 (1963-12-07)	6.9	56
4	"The Firemaker"	24:22	14 December 1963 (1963-12-14)	6.4	55

The first episode was transmitted at 5:16:20 p.m. on Saturday 23 November 1963. The assassination of U.S. President John F. Kennedy the previous day overshadowed the launch of the series; as a result, the first episode was repeated a week later, on 30 November, preceding the second episode. The first episode was watched by 4.4 million viewers (9.1% of the viewing audience), and it received a score of 63 on the Appreciation Index; the repeat of the first episode reached a larger audience of six million viewers. Across its four episodes, An Unearthly Child was watched by an average of 6 million (12.3% of potential viewers). Episodes 2–4 achieved ratings of 5.9, 6.9 and 5.4 million viewers, respectively. Mark Bould suggests that a disappointing audience reaction and high production costs prompted the BBC's chief of programmes to cancel the series until the Daleks, introduced in the second serial in December 1963, were immediately popular with viewers.

The serial has been repeated twice on the BBC: on BBC2 in November 1981, as part of the repeat season The Five Faces of Doctor Who, achieving average audience figures of 4.3 million viewers; and on BBC Four as part of the show's 50th anniversary on 21 November 2013, achieving an average of 630,000 viewers.

The serial initially received mixed reviews from television critics. Michael Gower of the Daily Mail wrote a short favourable review of the first episode, claiming that the ending "must have delighted the hearts of the Telegoons who followed". A reviewer in the Daily Worker stated that they "intend following closely" to the show, describing the ending as "satisfying". Variety felt that the script "suffered from a glibness of characterisations which didn't carry the burden of belief", but praised the "effective camerawork", noting that the show "will impress if it decides to establish a firm base in realism". After the second episode, Mary Crozier of The Guardian was unimpressed by the serial, stating that it "has fallen off badly soon after getting underway"; she felt that the first episode "got off the ground predictably, but there was little to thrill", while the second was "a depressing sequel ... wigs and furry pelts and clubs were all ludicrous". Conversely, Marjorie Norris of Television Today commented that if the show "keeps up the high standard of the first two episodes it will capture a much wider audience".

Retrospective reviews are mostly positive towards An Unearthly Child. In 1980, John Peel described the story as "a work of loving craftsmanship, worked out to perfection by all concerned". Referring to the serial while discussing the early years of Doctor Who in 1982, New Scientist's Peltu praised the script, acting and direction, but criticised the dated scenery. In The Discontinuity Guide (1995), Paul Cornell, Martin Day, and Keith Topping described the first episode as "twenty-five of the most important minutes in British television", particularly praising the directorial techniques, but felt that the following three episodes declined in quality. In The Television Companion (1998), David J. Howe and Stephen James Walker lauded Hartnell's performance and the reveal of the TARDIS interior in the first episode, and felt that the following three episodes were lesser in quality but remained "intense" and "highly dramatic". In A Critical History of Doctor Who (1999), John Kenneth Muir called the serial "an unqualified success as drama", applauding the writing, cinematic style, and production techniques.

In 2008, Radio Times reviewer Patrick Mulkern praised the casting of Hartnell, the "moody" direction and the "thrilling" race back to the TARDIS. Christopher Bahn of The A.V. Club in 2010 labelled An Unearthly Child an essential serial to watch for background on the programme. In his review, he noted that the first episode is "brilliantly done; the next three together could be about a half-hour shorter but get the job done". He praised the characters of Ian, Barbara, and the mysterious Doctor, but noted that he was far from the character he would become and Susan was "something of a cipher" with the hope she would develop later. In a 2006 review, DVD Talk's John Sinnott called the first episode "excellent", but felt the "story goes down hill a bit" with the introduction of the prehistoric time period. He cited the slower pace, the discussions in "Tarzan-speak", and the lack of tension or high stakes.

Doctor Who and an Unearthly Child

Author	Terrance Dicks
Cover artist	Andrew Skilleter
Series	Doctor Who book: Target novelisations
Release number	68
Publisher	Target Books
Publication date	15 October 1981
ISBN	0-426-20144-2

Writer David Whitaker omitted An Unearthly Child from the first spin-off novelisation, Doctor Who in an Exciting Adventure with the Daleks (later retitled Doctor Who and the Daleks and Doctor Who – The Daleks), with Ian and Barbara's entrance into the TARDIS leading directly into an adaptation of the second televised serial, The Daleks. Historian James Chapman highlights this as a reason that, in an age before home video, many people believed the Dalek serial to be the first Doctor Who story because the novelisations published by Target Books were the "closest that fans had to the original programmes". Terrance Dicks wrote the Target novelisation of this story, initially published as Doctor Who and an Unearthly Child on 15 October 1981 with a cover by Andrew Skilleter. The release also received several translations worldwide. A verbatim transcript of the transmitted version of this serial, edited by John McElroy and titled The Tribe of Gum, was published by Titan Books in January 1988. It was the first in an intended series of Doctor Who script books. In 1994, a phonecard with a photomontage of the episode was released by Jondar International Promotions.

The story was originally released on VHS on 5 February 1990, with a cover designed by Alister Pearson. The unaired pilot was released as part of The Hartnell Years on 3 June 1991, and with Doctor Who: The Edge of Destruction and Dr Who: The Pilot Episode on 1 May 2000. A remastered version of the serial was also released on VHS on 4 September 2000; for the DVD release on 30 January 2006, the serial was released as part of Doctor Who: The Beginning alongside the following two serials, with several special features, including audio commentaries and comedy sketches. It was also released in the US and Canada on 27 May 2014 as part of the Blu-ray set for An Adventure in Space and Time.

In October 2023, the BBC announced that An Unearthly Child would not be available on its iPlayer service the following month alongside other Doctor Who episodes as it did not hold the entire copyright. Coburn's son, Stef Coburn, claimed he had withdrawn the licensing rights following disagreements over compensation. Stef Coburn had previously requested recognition and compensation for his father's work in 2013 but said he did not wish to withdraw licensing rights at the time. He had since lambasted the programme's direction, claiming in 2023 that his father would be "outrage[d] at what generations of progressively more corrupted BBC filth have done", in response to the casting of actors Ncuti Gatwa and Jinkx Monsoon. Scenes featuring dialogue from An Unearthly Child were removed from the 2023 repeat of An Adventure in Space and Time, which many attributed to the licensing issues.

• An Unearthly Child at BBC Online
• An Unearthly Child at BBC Online
• An Unearthly Child Radio Times entry at the BBC Genome Project
• An Unearthly Child on Tardis Wiki, the Doctor Who Wiki