Cullen sets out in search for fresh water when some of his workers, himself included, suffers from cholera. He gets no help from Durant, who has difficulties of his own when Senator Metcalf threatens to remove him from Crédit Mobilier. Eva makes a decision about her child's future. The Swede poses as Bishop Duston, telling about the loss of his family to his Fort Smith escort. Ezra Dutson saves both Cullen and the town by leading him to water.