"What do you do when you're not sure?" If you're John Patrick Shanley, you write a play, call it Doubt, and begin with exactly that line. On stage, the line is spoken by a parish priest named Father Flynn at the beginning of a sermon.
Ninety taut minutes later, at the end of Shanley's Pulitzer Prize-winning drama, currently at the Hippodrome Theatre, this affable priest's actions will be the subject of doubt -- and that's a good thing. It's what thought-provoking theater is all about.
Doubt runs through May 13 at the Hippodrome Theatre, 12 N. Eutaw St. $27-$67. 410-547-SEAT or broadwayacrossamerica.com.