Shakespeare, now starring at Geffen Playhouse

As he watched the World Trade Center towers implode, Bill Cain, playwright and native New Yorker, felt a surge of fury pass through him. But as an ordained Jesuit priest, he was able to tap into another, equally powerful emotion. "I knew the only way to respond to it was with tenderness as fierce as that anger," he said recently. "And so the journey from rage to tenderness was what I felt my spiritual work had to be." For Cain, 62, that journey also turned out to be the writing of "Equivocation," a speculative, cerebrally pyrotechnic historical drama set in London in 1605 that will open Wednesday and run through Dec. 20 at the Geffen Playhouse. A hint of the...