Question: Alan Sidney Patrick Rickman was an English actor who gained wider notice for his film performance as a fictional character in a film series who becomes a double-agen on behalf of who? 
Context: Kimberly Kardashian West (born Kimberly Noel Kardashian; October 21, 1980) is an American reality television personality, socialite, actress, businesswoman and model.  Kardashian first gained media attention as a friend and stylist of Paris Hilton, but received wider notice after a 2003 sex tape with her former boyfriend Ray J was leaked in 2007.  Later that year, she and her family began to appear in the E! reality television series "Keeping Up with the Kardashians".  Its success soon led to the creation of spin-offs including "Kourtney and Kim Take New York" and "Kourtney and Khloé Take Miami".  Kardashian's personal life soon became subject to widespread media attention. Severus Snape is a fictional character in J. K. Rowling's "Harry Potter" series.  An exceptionally skilful wizard, his coldly sarcastic and controlled exterior conceals deep emotions and anguish.  A Professor at Hogwarts School of Witchcraft and Wizardry, Snape is hostile to the series' protagonist, Harry, the moment he sets foot in Snape's classroom; this hostility is rooted in Harry's resemblance to Harry's father James, who bullied and harassed Snape during their time at Hogwarts.  Though philosophically attracted to the Dark Arts and Lord Voldemort's ideology of wizard supremacy, Snape's love for Muggle-born Lily Evans, Harry's mother, eventually compels him to defect from the Death Eaters.  Snape becomes a double-agent on behalf of Albus Dumbledore and the Order of the Phoenix, and protects Harry throughout the series. Alan Sidney Patrick Rickman (21 February 1946 – 14 January 2016) was an English actor and director known for playing a variety of roles on stage and on screen.  Rickman trained at the Royal Academy of Dramatic Art in London, and was a member of the Royal Shakespeare Company, performing in modern and classical theatre productions.  His first big television part came in 1982, but his big break was as the Vicomte de Valmont in the stage production of "Les Liaisons Dangereuses" in 1985, for which he was nominated for a Tony Award.  Rickman gained wider notice for his film performances as Hans Gruber in "Die Hard" and Severus Snape in the "Harry Potter" film series. Benjamin Geza Affleck-Boldt (born August 15, 1972) is an American actor, director, screenwriter, and producer.  His accolades include two Academy Awards, three Golden Globe Awards, two BAFTA Awards and two Screen Actors Guild Awards.  He began his career as a child and starred in the PBS educational series "The Voyage of the Mimi" in 1984, before a second run in 1988.  He later appeared in the independent coming-of-age comedy "Dazed and Confused" (1993) and various Kevin Smith films including "Chasing Amy" (1997) and "Dogma" (1999).  Affleck gained wider recognition when he and childhood friend Matt Damon won the Golden Globe and Academy Award for Best Original Screenplay for "Good Will Hunting" (1997).  He then established himself as a leading man in studio films including the disaster drama "Armageddon" (1998), the romantic comedy "Forces of Nature" (1999), the war drama "Pearl Harbor" (2001) and the thriller "Changing Lanes" (2002). Christian Michael Leonard Slater (born August 18, 1969) is an American actor and producer.  He made his film debut with a leading role in the 1985 film "The Legend of Billie Jean".  He played a monk's apprentice alongside Sean Connery in "The Name of the Rose" (1986) and gained wider recognition for his breakthrough role in the 1988 cult film "Heathers".  In the 1990s, Slater starred in many big budget films, including "", "Interview with the Vampire", "", "Broken Arrow", and "Hard Rain".  He was also featured in the cult film "True Romance".  Since 2000, Slater has combined work in the film business with television, including appearances in "The West Wing" and "Alias" and starring in "Breaking In" and "Mind Games".  He currently has a leading role in the USA Network TV series, "Mr. Robot", for which he won his first Golden Globe at the 73rd Golden Globe Awards for Best Supporting Actor in a Series, Miniseries or Television Film. The Rebirth Brass Band is a New Orleans brass band.  The group was founded in 1983 by tuba/sousaphone player Philip Frazier, his brother, bass drummer Keith Frazier, and trumpeter Kermit Ruffins, along with other classmates and marching band members from Joseph S. Clark Senior High School, which Firstline Schools will be closing in the spring of 2018, in New Orleans’ Tremé neighborhood.  The band released its first album in 1984 on Arhoolie Records which was recorded in a Tremé neighborhood bar, and in 1989 gained wider notice with a series of releases on Rounder Records. The Magik Markers are a noise rock band from Hartford, Connecticut.  The members, Elisa Ambrogio, Pete Nolan and Leah Quimby started the band in their basement in 2001.  The band gained wider recognition after opening for Sonic Youth on their American tour in 2004.  Their debut album, "I Trust My Guitar, Etc.. ."  (released in vinyl only), was released in 2005 on Thurston Moore's Ecstatic Peace label.  In 2006, they released "A Panegyric To The Things I Do Not Understand" under Gulcher Records, the Markers' first proper CD.  Also in 2006, the band recorded a session for Southern records' Latitudes series, which was released as The Voldoror Dance.  Leah Quimby left in May 2006 to pursue a career in ventriloquism.  Various people filled in before they eventually settled as a duo composed of original members Pete and Elisa.  In September 2007, the band released Boss, which was produced by Lee Ranaldo.  This record was the most structured recording the Markers had released to date.  Following in the wake of the Textile release "For Sada Jane" and the "Road Pussy" CD-R, the band set out to more accurately capture the sound of Magik Markers practices and jams, as opposed to the performance driven chaos of live shows. Rosa Amelia Rivera (born July 2, 1981) is an American television personality and current CEO of Jenni Rivera Enterprises.  Rivera first gained media attention through her sister's (Jenni Rivera) death but she received wider notice after she began to star in Spanish-language reality shows.  In late 2014, she and her family began to appear in the reality television series "Rica, Famosa y Latina". John Connor is a fictional character of the "Terminator" franchise.  Created by writer and director James Cameron, the character is first referred to in the 1984 film "The Terminator" and first appears in its 1991 sequel "" initially portrayed by Michael Edwards (briefly as the older Connor) and then by teenage actor Edward Furlong throughout the remainder of the film; in addition, Linda Hamilton's real-life son Dalton Abbot played John as a toddler in a dream sequence.  The character is subsequently portrayed by 23-year-old Nick Stahl in the 2003 film "" and by 19-year-old Thomas Dekker in the 2008 television series "".  English actor Christian Bale portrays 33-year-old Connor in the film series's fourth installment, "Terminator Salvation", and Australian actor Jason Clarke portrays a 44-year-old Connor, who becomes the T-3000 and serves as the antagonist of the film series's fifth installment, "Terminator Genisys". Michael Alan Westen is a fictional character played by Jeffrey Donovan in the television series "Burn Notice", created by Matt Nix.  Michael, a spy and former Special Forces Operative of the Green Berets and Army Rangers, is widely known as a top CIA operative.  As a result, in many circles he is greatly feared.  He abruptly became the subject of a burn notice while on an assignment.  Forced to return to his hometown of Miami, Florida, he finds himself cut off from the United States Intelligence Community.  While searching for answers about his burn notice, Michael becomes an unlicensed freelance private investigator/troubleshooter to help those who have unique problems.
Answer: Albus Dumbledore