Constance Congdon imagines a research team of interstellar visitors delivering an illustrated lecture on the “lost” species of Homo sapiens. The cheerful extraterrestrials completely misunderstand the vignettes they present of suburban anomie, adolescent angst, miscommunication, dislocation, and dead jobs and dreams. But we get the pain, hard and fast, in this dark and glum 1984 comedy. There are so many ways earthlings can get lost, literally or not, and Congdon spares us few. There’s ingenious fun with props and video and down-to-earth performances that feel too real to have been written in advance, but Kristin Gehring’s plodding staging makes this stuff seem even sadder than it sounds. If there’s dignity in defeat, it’s not here. Through 8/27: Fri-Sat 8 PM, Sun 3 PM, Circle Theatre, 7300 W. Madison, Forest Park, 708-771-0700, $21-$23.