To teach his pupil Arthur that girls can be just as smart as boys, Merlin magically travels to the present, where he invites Sara, a bright studious teenager, to visit the Dark Ages. They are whisked back to a time of knights, castles, and evil enchantresses. By the end of the play, Arthur has learned that girls can be very clever. Sara has learned you can't always do everything by yourself, and everyone has learned that Might doesn't make Right. $17 general, $15 Seniors and SARTA, $13 for children 12 and under. Saturdays and Sundays at 1pm in Folsom. 353-1001. SutterStreetTheatre.com.