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? 
Alan Rickman:  Rickman gained wider notice for his film performances as Hans Gruber in "Die Hard" and Severus Snape in the "Harry Potter" film series. Severus Snape: Severus Snape is a fictional character in J. K. Rowling's "Harry Potter" series.
i don't know