"The Night Alive" by Conor McPherson, a production of Third Rail Repertory at the CoHo Theatre in Portland, Ore., through Mar. 14. Pictured: Damon Kupper and Christina Holtom. (Photo by Owen Carey)

Onstage This Week: Mar. 2-9

Families both fictive and real, and our alternately shared and shirked responsibility to our fellow humans, related or not, are among the themes highlighted this week onstage.