In James Valcq’s camp musical lampooning 1950s sci-fi, a small group of scientists and townspeople have to save Milwaukee from a pack of singing, dancing zombies from outer space. But despite the outlandish premise, the comedy is never quite as cheeky or outrageous as it should be–if there’s such a thing as a safe space zombie musical, this is it. BackStage Theatre Company’s production, a Chicago premiere, is lively but uneven. For every clever characterization or deft sight gag, you get a raft of flat singing and sloppy stagecraft.–Zac Thompson a Through 9/1: Fri-Sat 8 PM, Sun 3 PM, Athenaeum Theatre, 2936 N. Southport, 312-902-1500, $18-$20.