Opus: A chamber-music group replaces one of its members, and the drama offstage begins. Produced by the Old Globe Theatre. Now in previews, it opens March 26 at the Copley Auditorium, 1650 El Prado in Balboa Park. $29-$59. 619-23-GLOBE, www.oldglobe.org.
Acts of Faith: A second-generation Americanized Jew struggles to define her identity amid late 20th-century sexual and political power. Produced by Laterthanever Productions, it runs through March 29 at the Tenth Avenue Theatre, 930 10th Ave., Downtown. $20. 619-235-9353, www.laterthanever.org.
Facing East: Mormons Ruth and Alex McCormick, reeling from the suicide of their gay son, are stuck between faith and reality when they meet their son's partner for the first time. Through April 5 at Diversionary Theatre, 4545 Park Blvd. in University Heights. $20-$29. 619-220-0097, www.diversionary.org.
The History Boys: Eight British boarding-school seniors dwell on their plans for college and the pasts that got them that far. Through March 29 at Cygnet Theatre Company's Old Town Theatre, 4040 Twiggs St. in Old Town. $17-$27. 619-337-1525, www.cygnettheatre.com.
The Hit: It's anything but business as usual as an unlikely hit-man seriously screws up an assignment. Revival produced by Lamb's Players Theatre. Ongoing at The Horton Grand Theatre, 444 Fourth Ave., Downtown. $26-$48. 619-437-0660, www.lambsplayers.org.
Killer Joe: A dysfunctional trailer-park family is looking to bump off its mother and use the insurance money to pay off a drug debt. Through April 5 at Compass Theatre, 3704 Sixth Ave. in Hillcrest. $20-$23. 619-688-9210, www.compasstheatre.com.
Room Service: Book a theater; start rehearsals; put the cast up at a hotel; figure out how to pay for it later. Produced by Lamb's Players Theatre, it runs through March 29 at the Ione and Paul Harter Stage, 1142 Orange Ave. in Coronado. $30-$46. www.lambsplayers.org.
The Threepenny Opera: Polly Peachum's been caught with her hand in the capitalist cookie jar, but her accusers go easy on her in the benevolent spirit of socialism. Produced by San Diego Repertory Theatre, it runs through March 29 at The Lyceum, 79 Horton Plaza, Downtown. 619-544-1000, www.sandiegorep.com.