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?

Context paragraphs:
Saving Sally: Saving Sally is a 2016 English-language Philippine romantic comedy live-action animated film directed by Avid Liongoren.  Starring Rhian Ramos, Enzo Marcos, and TJ Trinidad, the film revolves around Marty (Marcos), an amateur comic book artist who falls for Sally (Ramos), a gadget inventor, and has since become her loyal protector and hero from the "monsters": her abusive parents, and her obnoxious boyfriend Nick (Trinidad).  Liongoren co-wrote the screenplay with Charlene Sawit-Esguerra and Carlo Ledesma, based on a short story written by Sawit-Esguerra in 2002, which was then entitled as "Monster Town".

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.

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).

A Study in Emerald: "A Study in Emerald" is a short story written by British fantasy and graphic novel author Neil Gaiman.  The story is a Sherlock Holmes pastiche transferred to the Cthulhu Mythos universe of horror writer H. P. Lovecraft.  It won the 2004 Hugo Award for Best Short Story.  The title is a reference to the Sherlock Holmes novel "A Study in Scarlet".  "A Study in Emerald" first appeared in the anthology "Shadows Over Baker Street", a collection of stories combining the worlds of Arthur Conan Doyle and H. P. Lovecraft; it has subsequently been available as part of Gaiman's short story collection "Fragile Things," in the collection "New Cthulhu: The Recent Weird", and is available online.  The online version takes the form of a Victorian periodical or newspaper, which includes various advertisements that reference characters such as Vlad Tepes, Victor Frankenstein, Spring Heeled Jack, and Dr. Jekyll.

The Summer Solstice: "The Summer Solstice", also known as "Tatarin" or "Tadtarin", is a short story written by Filipino National Artist for Literature Nick Joaquin.  In addition to being regarded as one of Joaquin's most acclaimed literary works, the tale is considered to be controversial.  The story narrates a ritual performed by women to invoke the gods to grant the blessing of fertility by dancing around a Balete tree that was already a century old.  Joaquin later turned this short story into a play entitled Tatarin: A Witches' Sabbath in Three Acts, on which a film adaptation has been based.

The Time of the Doctor: "The Time of the Doctor" is an episode of the British science fiction television programme "Doctor Who", written by Steven Moffat and directed by Jamie Payne, and was broadcast as the ninth "Doctor Who" Christmas special on 25 December 2013 on BBC One.  It features the final regular appearance of Matt Smith as the Eleventh Doctor and the first regular appearance of Peter Capaldi as the Twelfth Doctor following his brief cameo in "The Day of the Doctor".  The episode also features Jenna Coleman as the Doctor's companion Clara Oswald, plus several enemies of the Doctor, including the Cybermen, Silence, Daleks, and Weeping Angels.

Time Enough at Last: "Time Enough at Last" is the eighth episode of the American television anthology series "The Twilight Zone".  The episode was adapted from a short story written by Lynn Venable (pen name of Marilyn Venable).  The short story appeared in the January 1953 edition of the science fiction magazine "If: Worlds of Science Fiction" about seven years before the television episode first aired.  "Time Enough at Last" became one of the most famous episodes of the original "Twilight Zone" and has been frequently parodied since.  It is "the story of a man who seeks salvation in the rubble of a ruined world" and tells of Henry Bemis , played by Burgess Meredith, who loves books, yet is surrounded by those who would prevent him from reading them.  The episode follows Bemis through the post apocalyptic world, touching on such social issues as anti-intellectualism, the dangers of reliance upon technology, and the difference between aloneness (solitude) and loneliness.

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.

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".

Battles in the Desert: Battles in the Desert, or "Las batallas en el desierto", is a short story written by Mexican author José Emilio Pacheco.  The short story was first published in the Saturday edition of the Uno Más Uno, a Mexican newspaper, on June 7, 1980, but was published as a short story by Era the following year.  The short story is narrated by Carlos, as an adult, recounting his memories as a boy growing up in Mexico City in the late 1940s and 1950s.  In particular, his experiences and the events that unfolded after falling in love with one of his classmate’s mother comprise the central narrative of the short novel.

Supporting paragraphs: Weeping Angel Blink (Doctor Who)
Answer: Blink