California Stage’s latest production is Arlington, a so-called “chamber musical” about a lonely military wife (the excellent Analise Langford-Clark) whose everyday life is shadowed by fears and realizations of what war has done to her husband (Jonathan Blum), herself and humanity as a whole. F, Sa 8 pm; Su 2 pm. Through 5/1. Three Penny Theater at California Stage, 1723 25th Street; (916) 451-5822; www.calstage.org. J.C.