The extra man in "The Extra Man" turns out to be Paul Dano, playing the lead character but woefully overshadowed by a scene-stealing Kevin Kline.
Kline is at his eccentric, theatrical, comedic best here playing Henry Harrison, an escort for (very) elderly socialites.
Harrison, an apparent blowhard, claims to be a playwright who lost his way when his masterwork was stolen by a mysterious, jealous Belgian. He now devotes his creative energies to the art of attending to elderly and near-dead widows at social functions.
Their husbands and most of their male friends are dead, so they need an "extra man," schooled in the manners of a dying aristocracy, to accompany them to the opera and Russian Tea Room.