In the gloom department, Eric Mandlebaum's Roberta is an unfortunate misfire. Unfortunate because it has in its favor a story of high potential. A successful businessman, racked by guilt over his social and financial position, obsessively sacrifices everything - job, girlfriend, money and more - in order to rescue a prostitute from the streets. But Kevin Corrigan, who has done fine work in many lighter films, simply does not have the right stuff as an actor necessary to carry the tragic weight of the story. An uneven, repetitive script does little to help him.