Wicked is the touring production of the blockbuster Broadway musical that reimagines the witches of Oz, focusing on the unlikely friendship and rivalry between Elphaba and Glinda with a score by Stephen Schwartz. The touring company appears at the Boston Opera House, offering the show’s large-scale sets, costumes and signature numbers like “Defying Gravity.” As a long-running, Tony Award–nominated and Grammy-winning theatrical phenomenon, Wicked is notable for its spectacle and emotional storytelling that draws broad audiences.