“The Water Man” stars the ensemble cast of David Oyelowo (“Selma”), Rosario Dawson (“Seven Pounds”), Lonnie Chavis (“This Is Us”), Amiah Miller (“War for the Planet of the Apes”), Alfred Molina (“Spider-Man 2”), and Maria Bello (“NCIS”). The film is the directorial debut of David Oyelowo and is based on the “Black List” script written …