Question: What British science fiction television series had it's episode entitled "Smile" written by the winner of the 2012 Guardian Prize for "The Unforgotten Coat"?

full_context: Document 1: Knock Knock (Doctor Who): "Knock Knock" is the fourth episode of the tenth series of the British science fiction television series "Doctor Who". It is written by Mike Bartlett and was broadcast on 6 May 2017 on BBC One. "Knock Knock" received mixed reviews from critics, receiving criticism regarding the strength of the writing, but praise on the quality of the performances in the story, particularly Suchet's.
Document 2: Smile (Doctor Who): "Smile" is the second episode of the tenth series of the British science fiction television series "Doctor Who". It is written by Frank Cottrell-Boyce and was broadcast on 22 April 2017 on BBC One. "Smile" received generally positive reviews from critics, with critics commenting on the Doctor and Bill's growing relationship.
Document 3: Avril Joy: Avril M. Joy is a British author whose short story "Millie and Bird" won the Costa Short Story Award in the 2012 Costa Book Awards.
Document 4: Britten's Children: Britten's Children is a scholarly 2006 book by John Bridcut that describes the English composer Benjamin Britten's relationship with several adolescent boys. Bridcut has been praised for treating such a sensitive subject in "an impeccably unsensational tone". The Britten-Pears Foundation described the book as having been "enthusiastically received as shedding new light on one of the most interesting aspects of Britten's life and career, in a study that is thoroughly researched, wonderfully readable and thought-provoking". Bridcut's book followed his television documentary "Britten's Children" shown on BBC2 in June 2004.
Document 5: 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 6: Coraline: Coraline is a dark fantasy children's novella by British author Neil Gaiman, published in 2002 by Bloomsbury and Harper Collins. It was awarded the 2003 Hugo Award for Best Novella, the 2003 Nebula Award for Best Novella, and the 2002 Bram Stoker Award for Best Work for Young Readers. It has been compared to Lewis Carroll's "Alice's Adventures in Wonderland" and was adapted into a 2009 stop-motion film directed by Henry Selick.
Document 7: Extremis (Doctor Who): "Extremis" is the sixth episode of the tenth series of the British science fiction television series "Doctor Who". It is written by Steven Moffat and was broadcast on 20 May 2017 on BBC One. "Extremis" received extremely positive reviews from television critics, with many praising Peter Capaldi's performance and Steven Moffat's script, though some commented on the complicatedness of the script.
Document 8: 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.
Document 9: Blue Peter Book Award: The Blue Peter Book Awards are a set of literary awards for children's books conferred by the BBC television programme "Blue Peter". They were inaugurated in 2000 for books published in 1999. The Awards have been managed by reading charity, Booktrust, since 2006. As of 2013, there are two award categories: Best Story and Best Book with Facts.
Document 10: Thin Ice (Doctor Who): "Thin Ice" is the third episode of the tenth series of the British science fiction television series "Doctor Who". It is written by Sarah Dollard and was broadcast on 29 April 2017 on BBC One. "Thin Ice" received mostly positive reviews from critics, with many labelling the topic of racism in the episode as well-executed.
Document 11: Frank Cottrell-Boyce: Cottrell-Boyce has won two major British awards for children's books, the 2004 Carnegie Medal for "Millions", which originated as a film script, and the 2012 Guardian Prize for "The Unforgotten Coat", which was commissioned by a charity.
Document 12: Dinosaurs on a Spaceship: "Dinosaurs on a Spaceship" is the second episode of the seventh series of the British science fiction television programme "Doctor Who". It first aired on BBC One in the UK on 8 September 2012 and on BBC America on the same date in the United States. It was written by Chris Chibnall and directed by Saul Metzstein.
Document 13: 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 14: Millions (2004 film): Millions is a 2004 British comedy-drama film directed by Danny Boyle, and starring Alex Etel, Lewis Owen McGibbon, and James Nesbitt. The screenwriter Frank Cottrell Boyce adapted his novel while the film was in the process of being made. The novel "Millions" was subsequently awarded the Carnegie Medal. This is Danny Boyle's only film not R rated by the Motion Picture Association of America.
Document 15: Peter Pan Prize: The Peter Pan Prize was established in 2000 by IBBY Sweden and the Göteborg Book Fair. It is awarded annually "to a book for children or young adults of high quality in both literary and subject terms, satisfying one or more of the following criteria: (1) by an author previously unpublished or little known in Sweden; (2) from a country, language group or culture with limited representation in Sweden; (3) with content concerning children or young adults in less familiar countries and cultures less familiar to Swedish readers"
ground_truth: Doctor Who