Mystery Files is a 1997 Hong Kong science fiction thriller television series produced by TVB and stars Gallen Lo as a biochemist who advocates scientific methods to refute superstitious theories, utilizing scientific theories to uncover the answers to a series of strange events.
"Helix" is an American science fiction thriller television series that premiered on Syfy on January 10, 2014.
 The series follows a team of scientists from the Centers for Disease Control and Prevention who travel to a research facility in the Arctic to investigate a potential outbreak of disease.
 While there, they find themselves stuck in a life-or-death situation that could decide the future of mankind.
XChange (also spelled: Xchange and X Change) is a 2000 Canadian science fiction thriller film directed by Allan Moyle.
"Orphan Black" is a Canadian science fiction television series that premiered on March 30, 2013 on Space.
 The series was created by Graeme Manson and John Fawcett, starring Tatiana Maslany as several clones.
 The rest of the starring cast includes Dylan Bruce, Jordan Gavaris, Kevin Hanchard, Michael Mando, Maria Doyle Kennedy, Évelyne Brochu, Ari Millen, Kristian Bruun and Josh Vokey.
The Aurora Awards are given out annually for the best Canadian science fiction and fantasy literary works, artworks, fan activities from that year.
 The event is organized by Canvention and the awards are given out by the Canadian SF and Fantasy Association, which began in 1980.
 The awards are selected by member vote, similarly to the Hugo Awards, and cover work in both English and French.
 The French-language Prix Aurora Boréal was created through an agreement between SFSF Borál Inc. and the Canadian Science Fiction and Fantasy Association in November 2010, which combed the Prix Boréal and Prix Aurora into a single award.
Orphan Black is a Canadian science fiction thriller television series created by screenwriter Graeme Manson and director John Fawcett, starring Tatiana Maslany as several identical people who are clones.
 The series focuses on Sarah Manning, a woman who assumes the identity of one of her fellow clones, Elizabeth Childs, after witnessing Childs' suicide.
 The series raises issues about the moral and ethical implications of human cloning, and its effect on issues of personal identity.
"The Original" is the first episode of the HBO science fiction thriller television series "Westworld".
 The teleplay was written by series co-creators Jonathan Nolan and Lisa Joy, who wrote the story with Michael Crichton, writer and director of the 1973 film the series is based on; the episode was directed by Nolan.
Maria Josephine Doyle Kennedy (born 25 September 1964) is an Irish singer-songwriter and actress.
 With a singing career that has spanned nearly thirty years and an acting career that has spanned twenty five, she has established herself as one of Ireland's most prolific artists and entertainers.
 As an actress, she is best known for her extensive television roles as Patsy on "Father Ted" (1998), Catherine of Aragon on "The Tudors" (2007–2010), Vera Bates on "Downton Abbey" (2011), and Siobhán Sadler on "Orphan Black" (2013–2017).
 As a musician, she is well known for her world wide hit folk albums "Mütter" and "Sing", as well as for releasing two albums between 1989-92 as part of The Black Velvet Band.
"Orphan Black" is a Canadian science fiction television series broadcast on Space in Canada and on BBC America in the United States.
 The series' first season stars Tatiana Maslany, Dylan Bruce, Jordan Gavaris, Kevin Hanchard, Michael Mando, and Maria Doyle Kennedy, with the addition of Évelyne Brochu to the regular cast in the second season, Kristian Bruun and Ari Millen in the third, and Josh Vokey in the fourth.
 "Orphan Black" revolves around the main character of Sarah Manning as she discovers the existence of several of her genetic identicals.
 Numerous actors appear in the series as recurring cast members, but some guest actors are featured in only a few.
 Particularly, Skyler Wexler often recurs as Sarah's daughter Kira.
Sole Survivor also known as Dean Koontz's Sole Survivor is a Canadian science fiction Thriller film/mini-series adaptation of Dean Koontz's novel of the same name, made and released in 2000 and directed by Mikael Salomon.

Question: What character did Maria Doyle Kenndy play in the Canadian science fiction thriller television series?
Answer: Siobhán Sadler