Julien Duvivier directed this battle of wits in which a traitor is exposed at a dinner party. Danielle Darrieux. Julien: Bernard Blier. Leon: Robert Dalban. Father Yves: Paul Guers. Lucien: Paul Frankeur. Carlo: Lino Ventura. Renaud-Picart: Paul Meurisse. Antoine: Serge Reggiani.