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? 

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. <SEP> 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". <SEP>  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. Severus Snape is a fictional character in J. K. Rowling's "Harry Potter" series.  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. <SEP>  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. 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 gained wider notice for his film performances as Hans Gruber in "Die Hard" and Severus Snape in the "Harry Potter" film series.