Continuity mistake: When Selena is leaving on the ferry near the end, and Detective John Mackey pulls up and watches her drifting away, as he gets out of the car the windsheild wipers stop moving. In the next behind shot of him standing at the dock edge, watching, they are back on again.
Factual error: In one scene, we Dolores driving back home, after the scene where Vera tells her that accidents can 'happen' to wives husbands every day. The shot shows a huge full moon in the sky. Everyone who has every learnt any science/astronomy should know that a huge full moon cannot occur the night before a solar eclipse.