The episode opens with David waking in a stony field. Fire burns over some of the stones, and he sees a waterfall that blends into a river. When the young shepherd touches the water, his hand ignites.

Samuel (Stephen Lang) in “House of David” (Credit: Nikos Nikolopoulos/Prime) Stephen Lang as Samuel. Looming over the series with a mystical presence and pious eye, Samuel is a “seer.” ...