Preview: ‘Constellations’ at William J. Geery Theatre

Just two characters make up Nick Payne’s award-winning play about romance, Constellations, but there’s a third element with an enormous presence in the work: atypical narrative structure. Marianne (Elizabeth Dean) and Roni (Leah Finity) are simultaneously romantically entangled and not, as they run through variations of the same scenes, each featuring a different outcome. The script is often opaque with its descriptions of quantum mechanics, but the exploration of this will-they-won’t-they-have-they-already relationship set in multiple universes is whimsical, mostly comprehensible and relatable. Sarah Diaz directs. Fri 8pm, Sat 8pm, Sun 2pm. Through 10/21; $16-$20; Errant Phoenix Productions at William J. Geery Theatre, 2130 L Street; (415) 963-2442; errantphoenix.com.