Each Tuesday at 5 PM, Wicked fans will have the opportunity to take a one-hour tour that concludes with a question-and-answer session with current cast members. Participants in the tour will visit the "Behind the Emerald Curtain" Museum, which includes Eugene Lee's set model, an up-close view of Susan Hilferty's costumes as well as props and wigs from the show. The tour also features footage about the making of the hit Stephen Schwartz-Winnie Holzman musical. A similar tour is offered for the New York production of Wicked at the Gershwin Theatre.

Based on Gregory Maguire's novel, which turned every Oz myth inside out, Wicked explores the early life of the witches of Oz: Glinda and Elphaba. The two main characters meet at Shiz, a school where both hope to take up sorcery. Glinda is madly popular and Elphaba is, well, green. By a misunderstanding, they wind up roommates and, after an initial period of mutual loathing, begin to learn something about each other. Their life paths continue to intersect through a shared love, entry into the Emerald City and interaction with the Wizard himself. Eventually, their choices and convictions take them on widely different paths.

Tickets for the tour, priced $25, are available by visiting Broadway in Chicago box offices (24 W. Randolph Street, 151 W. Randolph Street and 18 W. Monroe Street), by calling (312) 902-1400 or by logging on to www.ticketmaster.com. (The tour price does not include admission to the musical.)

For more information visit www.wickedthemusical.com/chicago.