Watch In the Dark of the Valley (2021) HD Full Movie Free on solarmovie.do. Watch In the Dark of the Valley (2021) online free. A group of mothers discover that the Santa Susana Field Laboratory was the site of one of the larges...A group of mothers discover that the Santa Susana Field Laboratory was the site of one of the largest nuclear accidents in United States history; and may have exposed their children and their community to cancer-causing hazardous waste.