Continuity mistake: Picard has a cut on the right side of his head in the scene where he, Worf and Gallatin are on the Son'a bridge. It is most visible when he says to Gallatin "Take us into position". After Picard takes the rifle from Worf and Gallatin says "We're approaching the collector", the cut on Picard's head is gone. After he has beamed over to the collector, the cut is back and is bleeding a lot more than it did before.