Question: The actor that played the title role in the series "Merlin" also appeared in a 2014 2014 British film based on the First World War memoir by what author?
Context: The Password is Courage is a 1962 MGM black-and-white film based on John Castle's 1954 Second World War memoir of the same name.  Written, produced and directed by Andrew L. Stone, the film stars Dirk Bogarde, Maria Perschy and Alfred Lynch.  It is a lighthearted take on the true story of Sergeant-Major Charles Coward, written under the pseudonym John Castle by Ronald Charles Payne and John Williams Garrod. Peter Dinklage is an American actor and producer.  Dinklage studied acting at the Bennington College where he starred in a number of amateur stage productions.  He made his film debut in the 1995 comedy-drama "Living in Oblivion".  After appearing in a series of supporting parts in much of the 1990s and early 2000s, he made his breakthrough by starring in the Tom McCarthy-directed comedy-drama "The Station Agent" (2003), which had him play a railroad-obsessed introvert who inherits an abandoned train depot.  He was cast in the role by director Tom McCarthy who recalled fondly his appearance in McCarthy's play "The Killing Act" (1995).  For his performance, he received a Screen Actors Guild Award nomination for Best Actor and an Independent Spirit Awards nomination for Best Male Lead.  In the same year, Dinklage played the title role in the play "Richard III" at The Public Theater.  He also played a children's book author in the comedy "Elf".  In 2006, he appeared in the Sidney Lumet-directed crime film "Find Me Guilty".  He followed with roles in the films "Underdog" (2007), the British film "Death at a Funeral" (2007), with its American remake of the same name (2010) and Trumpkin in the high fantasy film "" (2008). "Lions led by donkeys" is a phrase popularly used to describe the British infantry of World War I and to blame the generals who led them.  The contention is that the brave soldiers (lions) were sent to their deaths by incompetent and indifferent leaders (donkeys).  The phrase was the source of the title of one of the most scathing examinations of British First World War generals, The Donkeys—a study of Western Front offensives—by politician and writer of military histories Alan Clark.  The book was representative of much of the First World War history produced in the 1960s and was not outside the mainstream—Basil Liddell Hart vetted Clark's drafts—and helped to form a popular view of the First World War (in the English-speaking world) in the decades that followed.  However, the work's viewpoint of incompetent military leaders was never accepted by some mainstream historians, and both the book and its viewpoint have been subject to attempts at revisionism. The Honourable Woman is a 2014 British political spy thriller television miniseries in eight parts, directed and written by Hugo Blick for the BBC and SundanceTV.  Featuring Maggie Gyllenhaal in the title role, it aired on BBC Two in the United Kingdom on 3 July 2014 and premiered on SundanceTV in the United States on 31 July 2014.  An advance screening of the series was held on 7 April 2014 at the MIPTV Media Market. Testament of Youth is a 2014 British drama film based on the First World War memoir of the same name written by Vera Brittain.  The film stars Alicia Vikander as Vera Brittain, an independent young woman who abandoned her Oxford studies to become a war nurse.  The film was directed by James Kent and written by Juliette Towhidi. The Sleeping Room is a 2014 British horror film that was directed by John Shackleton.  It had its world premiere on 23 August 2014 at the London FrightFest Film Festival and stars Leila Mimmack as a call girl who finds herself entangled in a series of strange events surrounding a hidden room.  Funding for "The Sleeping Room" was raised using equity crowdfunding and is credited as being the first British film to use this method. Testament of Youth is a 1979 BBC television drama based on the First World War memoir of the same name written by Vera Brittain.  It was transmitted on BBC2. The Adventurer: The Curse of the Midas Box is a 2014 British fantasy adventure film starring Michael Sheen, Sam Neill, Lena Headey, Ioan Gruffudd, Keeley Hawes, Tristan Gemmill, and Aneurin Barnard in the title role and directed by Jonathan Newman.  It is the first in what is intended to be a film franchise, and was written by Christian Taylor and Matthew Huffman, based upon the novel "Mariah Mundi" by G. P. Taylor. Michelangelo in Ravensbrück: One Woman's War against the Nazis is a memoir by Karolina Lanckorońska, a World War II resistance fighter and postwar historian who survived the Ravensbrück concentration camp for women and after liberation went on to record the history of this lesser known side of the Holocaust in occupied Poland.  Initially, Lanckorońska did not want her war memoir published in her lifetime.  However, after much persuasion she consented to publication in Poland, by ZNAK Publishing of Kraków in 2001, a year before her death.  The book, whose British version is titled "Those Who Trespass against Us: One Woman's War against the Nazis", sold over 50,000 copies in the Polish original and is now selling well in English.  The U.S. edition was published in hardback in Spring 2007 by Da Capo Press (Perseus Publishing Group) under the new title, "Michelangelo in Ravensbrück". Colin Morgan (born 1 January, 1986) is a British/Irish film, television, theatre and radio actor best known for playing the title character in the BBC fantasy series "Merlin", the lead in "The Living and the Dead", and main roles in "Humans" and "The Fall"; his stage role as Ariel in "The Tempest"; and film roles in "Testament of Youth", "Legend" and "".
Answer: Vera Brittain