Heroes Unmasked is a behind-the-scenes documentary television series of the American television series "Heroes", made by the BBC and narrated by Anthony Head in series 1–2, and in series 3 by former "Heroes" actor Santiago Cabrera.
 The show aired after an episode was shown on BBC Two, with one special episode that aired on a Saturday to coincide with the Heroes Catch-Up Weekend, through seasons one and two and for the "volume three" episodes of season three.
 A 65-minute special, narrated by Martin Freeman, accompanied the season one finale in addition to the usual episode of "Unmasked", and an extra episode of usual length was broadcast a week before season two began.
The History of Howard Stern is a radio documentary series about the life, career and achievements of American radio personality Howard Stern broadcast on Howard 100 and Howard 101 on Sirius XM Radio.
 The ongoing series has featured 35 episodes across four "Acts".
 Each episode includes segments from past broadcasts of "The Howard Stern Show", interviews with Stern's staff and celebrity guests, his family and news reports.
 Narrated by Jim Forbes of VH1's "Behind the Music", the series is produced by "The Tapes Team", a group at Sirius who put together other special programming such as "Mammary Lane" and "Stern Spotlight".
Find My Family is an Australian television documentary series airing on the Seven Network.
 The first two seasons were narrated and presented by actor Jack Thompson.
 From the third season onwards it did not have a presenter, instead being narrated by Sarah McIntyre.
Deep Sea 3D is a 3D IMAX documentary film about sea life.
 The documentary is directed by Howard Hall who has also directed other undersea films such as "Into the Deep" and "Island of the Sharks".
 The film is narrated by Johnny Depp and Kate Winslet.
 It also features music by Danny Elfman.
 The film is 40 minutes long.
Combat America is a 1945 documentary film produced in World War II, narrated by Clark Gable.
 At the time of the film's production in 1943, Gable was a 1st Lieutenant in the Eighth Air Force, part of the United States Army Air Forces.
 While he was stationed in England, Gable flew five combat missions from May 4–September 23, 1943, and during one of them, his boot was struck by an anti-aircraft shell, and he was nearly hit by other flak bursts.
 Gable's film crew included MGM cameraman Andrew J.McIntyre; 1st Lt. Howard Voss, a sound engineer; Master Sgt. Robert Boles, a cameraman; Master Sgt. Marlin Toti, an other cameraman; and 1st Lt. John Mahlin, a scriptwriter."
Horror in the East: Japan and the Atrocities of World War II (2000) is a two-part BBC documentary film that examines certain actions, including atrocities, and attitudes, of the Imperial Japanese Army in the lead up to and during World War II.
 The film also examines attitudes held by the British and Americans, toward the Japanese.
 It was written and produced by Laurence Rees and narrated by Samuel West.
Walls of Fire is a 1971 documentary film directed by Herbert Kline and Edmund Penney.
 Narrated by Ricardo Montalbán, this documentary examines the history of Mexican murals and their artists.
 Among the works examined are those by José Clemente Orozco, Diego Rivera and David Alfaro Siqueiros.
 It was nominated for an Academy Award for Best Documentary Feature.
 The documentary was also won a Golden Globe award for Best Documentary film in 1972.
Samuel Alexander Joseph West, also known as Sam West (born 19 June 1966), is an English actor and director.
 He is best known for his role in the film "Howards End" and his work on stage (including the award-winning play "Enron").
Paragraph 175 is a documentary film released in 2000, directed by Rob Epstein and Jeffrey Friedman, and narrated by Rupert Everett.
 The film was produced by Rob Epstein, Jeffrey Friedman, Janet Cole, Michael Ehrenzweig, Sheila Nevins and Howard Rosenman.
 The film chronicles the lives of several gay men and one lesbian who were persecuted by the Nazis.
 The gay men were arrested by the Nazis for the crime of homosexuality under Paragraph 175, the sodomy provision of the German penal code, dating back to 1871.
Forget Us Not is a 2013 feature-length documentary film by Heather Connell, which follows the stories of some of the 5 million non-Jewish Holocaust survivors including artist Ceija Stojka and is narrated by actor Ron Perlman.
 The documentary was released on the festival circuit in August 2013 and has won eight awards to date including Feature Documentary and Editing Awards Of Merit from Accolade Film Competition, Helping Hand International Humanitarian Award from the Rhode Island International Film Festival, Best of Festival at Vancouver's Columbia Gorge International Film Festival, Mark Of Distinction Film at the New York Independent Film Festival and Best Narration and World Peace Impact Award from the Artisan World Peace Hamptons Film Festival and Feature Documentary Audience Award at the First Glance International Film Festival Los Angeles.

Question: What documentary was narrated by an actor from the film "Howard's End"?
Answer: Horror in the East