In this new drama, Jason Ewers examines the relationship between an estranged brother and sister, reunited after their younger brother has a serious motorcycle accident. When Ewers just leaves his characters alone together in a room, Life Support throbs with the kind of anger and resentment common among unhappy families. But too often he undermines the momentum with blackouts and poorly integrated flashbacks. It's a shame because Garrett Prejean and Erin Shelton give authentic, nuanced performances as the siblings, conveying the deep sadness beneath the sister's stringency and the brother's loser charm. Through 6/2: Thu 7 PM, Fri-Sat 8 PM, Sun 7 PM, EP Theater, 1820 S. Halsted, 312-850-4299, $10-$15.