Here's a question you won't usually hear at cocktail parties: "Did you ever know anyone who had a dark epiphany?"

That was what filmmaker Jessica Yu was asking of friends and acquaintances when seeking subjects for her documentary, "Protagonist."

The concept was to look at real lives through the dramatic narrative structure of Euripides. The four lives she chose belong to four men who were an L.A. bank robber, a German terrorist, an "ex-gay" evangelist and a martial-arts student. The stories are cross-cut with examples of Greek drama, illustrated by gracefully designed puppetry.

Yu said one of the four, former terrorist Hans-Joachim Klein, lives in exile in France and could not come to the United States. The other three were in Park City earlier this week, Yu said, "and they are thick as thieves. We should have tour jackets made."