In an episode conceived in the form of an Italian opera, an alternate, imaginary version of the surveyors' final days in America is relayed where they continue west past the Ohio River, cross the Mississippi, encounter a variety of carnivalesque inhabitants of the interior, and become the first to discover Uranus. Again Dixon wishes to remain, but Mason sees the "new" planet as a ticket to acceptance and a life of ease, so they return east, making all those they met and passed while going west uneasy. In the end Dixon imagines continuing east with the line, and drawing it straight across the Atlantic.