Question: What Dr. Who episode was based on a short story written by Moffat entitled "'What I Did on My Christmas Holidays' By Sally Sparrow" included a Weeping Angel?

full_context: Document 1: Heaven Sent (Doctor Who): "Heaven Sent" is the eleventh and penultimate episode of the ninth series of the British science fiction television series "Doctor Who". It was first broadcast on BBC One on 28 November 2015. It was written by Steven Moffat and directed by Rachel Talalay.
Document 2: Flesh and Stone: "Flesh and Stone" is the fifth episode of the fifth series of British science fiction television series "Doctor Who". Written by Steven Moffat and directed by Adam Smith, the episode was first broadcast on 1 May 2010 on BBC One. It is the conclusion of a two-episode story that began with "The Time of Angels" that features the Weeping Angels as primary villains and sees the return of the character River Song (Alex Kingston).
Document 3: Time Lord: The Time Lords are a fictional, ancient extraterrestrial species in the British science fiction television series "Doctor Who", of which the series' protagonist, the Doctor, is a member. Time Lords are so named for their command of time travel technology and their non-linear perception of time. Originally they were described as a powerful and wise race from the planet Gallifrey, from which the Doctor was a renegade; details beyond this were very limited for the first decade of the series. They later became integral to many episodes and stories as their role in the fictional universe developed. For the first eight years after the series resumed in 2005, the Time Lords were said to have been destroyed at some point between the original series' cancellation in 1989 and the show's revival during the fictional Last Great Time War. In 2013, the 50th anniversary special "The Day of the Doctor" concerned this supposed destruction and their eventual survival.
Document 4: A Town Called Mercy: "A Town Called Mercy" is the third episode of the seventh series of the British science fiction television series "Doctor Who", transmitted on BBC One in the United Kingdom on 15 September 2012. It was written by Toby Whithouse and directed by Saul Metzstein.
Document 5: The Time of Angels: "The Time of Angels" is the fourth episode in the fifth series of British science fiction television series "Doctor Who", first broadcast on 24 April 2010 on BBC One. It is the first episode of a two-part story written by showrunner Steven Moffat and directed by Adam Smith; the second episode was "Flesh and Stone". Moffat utilised the two-part episode to bring back a couple of his previous creations: the Weeping Angels from his series three episode "Blink", and River Song (Alex Kingston) from the series four episodes "Silence in the Library" and "Forest of the Dead". The episode is partly set in the 51st century.
Document 6: The Crimson Horror: "The Crimson Horror" is the eleventh episode of the seventh series of the British science-fiction drama "Doctor Who". It was written by Mark Gatiss and directed by Saul Metzstein.
Document 7: Blink (Doctor Who): "Blink" is the tenth episode of the third series of the British science fiction television series "Doctor Who". It was first broadcast on 9 June 2007 on the British Broadcasting Corporation (BBC). The episode was directed by Hettie MacDonald and is the only episode in the 2007 series written by Steven Moffat. The episode is based on a previous short story written by Moffat for the 2006 "Doctor Who Annual", entitled "'What I Did on My Christmas Holidays' By Sally Sparrow".
Document 8: Creatures (video game series): Creatures is an artificial life (alife) computer program series, created in the mid-1990s by English computer scientist Steve Grand whilst working for the Cambridge video games developer Millennium Interactive. Gameplay focuses on raising alien creatures known as Norns, teaching them to survive, helping them explore their world, defending them against other species, and breeding them. Words can be taught to creatures by a learning computer (for verbs) or by repeating the name of the object while the creature is looking at it. After a creature understands language, the player can instruct their creature by typing in instructions, which the creature may choose to obey. A complete life cycle is modelled for the creatures - childhood, adolescence, adulthood, and senescence, each with their own particular needs. The gameplay is designed to foster an emotional bond between the player and their creatures. Rather than taking a scripted approach, Creatures series games were driven by detailed biological and neurological simulation and their unexpected results. There were six major Creatures releases from Creature Labs. Between 1996 and 2001, there were three principal games released, the Docking Station add-on (generally referenced as a separate game) and two children's games, and there were three games created for console systems. A sequel named "Creatures Online" was in development, with the artificial life technology from Creatures 3 and Docking Station updated to a 3D environment.
Document 9: World Enough and Time (Doctor Who): "World Enough and Time" is the eleventh episode of the tenth series of the British science fiction television series "Doctor Who". It is written by Steven Moffat, directed by Rachel Talalay, and was broadcast on 24 June 2017 on BBC One. The episode received overwhelmingly positive reviews from television critics.
Document 10: River Song (Doctor Who): River Song is a fictional character created by Steven Moffat and played by Alex Kingston in the British science-fiction series "Doctor Who". River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS. Because River Song is a time traveller herself, her adventures with the Doctor occur out of synchronisation; their first meeting (from the audience's perspective) is his first and apparently her last. In later appearances, River is a companion, romantic interest and eventual wife of the Doctor in his eleventh incarnation portrayed by Matt Smith. River Song was created by "Doctor Who" writer Steven Moffat for the show's fourth series in 2008, under the tenure of executive producer Russell T Davies. When Moffat took over Davies' duties as executive producer, he began expanding on the character's background, depicting adventures earlier in River's timeline, upgrading Alex Kingston from a guest star to a recurring actor in the series. Other actresses have subsequently portrayed younger versions of the character.
Document 11: Angel (Buffy the Vampire Slayer): Angel is a fictional character created by Joss Whedon and David Greenwalt for the American television programs "Buffy the Vampire Slayer" and its spin-off series "Angel". The character is portrayed by actor David Boreanaz. As introduced in "Buffy" in 1997, Angel is a love interest for heroine Buffy Summers (Sarah Michelle Gellar), a young woman whose destiny as "the Slayer" is to fight the forces of evil, such as vampires and demons. However, their relationship is complicated by the fact that Angel is himself a vampire cursed with remorse and a human soul, which motivates him to assist Buffy in her duties as Slayer. The character's popularity led to the production of the spin-off "Angel", which follows the character's struggle towards redemption after moving to Los Angeles. In addition to the two television series, the character appears in the comic book continuations of both series, as well as much other expanded universe literature. Angel appears in the most television episodes of all the characters of both "Buffy the Vampire Slayer" and "Angel", appearing in 167 episodes (57 in "Buffy" and all 110 in "Angel").
Document 12: The Snowmen: "The Snowmen" is an episode of the British science fiction television series "Doctor Who", first broadcast on Christmas Day 2012 on BBC One. It is the eighth "Doctor Who" Christmas special since the show's 2005 revival and the first to be within a series. It was written by head writer and executive producer Steven Moffat and directed by Saul Metzstein.
Document 13: Weeping Angel: The Weeping Angels are a race of predatory creatures from the long-running sci-fi series "Doctor Who", resembling stone statues. They were introduced in the 2007 episode "Blink", making repeat appearances in "The Time of Angels" / "Flesh and Stone" (2010) and "The Angels Take Manhattan" (2012) as well as cameo appearances in "The God Complex" (2011), "The Time of the Doctor" (2013) and "Hell Bent" (2015). They also feature in the spin-off series "Class", in the first series finale "The Lost" (2016). Since their initial appearance, they have been persistently nominated as one of the most popular and frightening "Doctor Who" monsters. Steven Moffat, their creator, attributes their appeal to childhood games such as Grandmother's Footsteps and the notion that every statue might secretly be a disguised Weeping Angel.
Document 14: The Name of the Doctor: "The Name of the Doctor" is the thirteenth and final episode of the seventh series of the British science-fiction drama "Doctor Who" and was broadcast on 18   2013 (2013--) . It was written by Steven Moffat and directed by Saul Metzstein.
Document 15: The Doctor Falls: "The Doctor Falls" is the twelfth and final episode of the tenth series of the British science fiction television series "Doctor Who". It is written by Steven Moffat, directed by Rachel Talalay, and was broadcast on 1 July 2017 on BBC One. It is the second episode of a two-part story, the first part being "World Enough and Time". The episode received overwhelmingly positive reviews from television critics.
ground_truth: Blink