Wicked is a touring production of the Tony-winning Broadway musical that reimagines the relationship between Elphaba (the Wicked Witch of the West) and Glinda before the events of The Wizard of Oz. The show plays at the Boston Opera House and features Stephen Schwartz’s score, elaborate sets and costumes, and large-scale staging typical of the national touring company. It is notable for its hit songs (including “Defying Gravity”), its long-running popularity on Broadway and tours, and its reputation as a major commercial and theatrical attraction for musical-theatre audiences.