“Dark Waters” (*** out of four) was an absorbing and compelling story about a high-rolling corporate defense attorney (Mark Ruffalo) who has a crisis of conscience and decides to take on an environmental lawsuit against a chemical company whose pollution affected thousands and he gradually becomes obsessed with taking them to court and restoring justice, at any personal and professional cost to his career. Sharply made and directed by Todd Haynes, in a story that bears a lot of similarity to both “A Civil Action” and “Michael Clayton.” Ruffalo is adequate in the lead but is surrounded by a first-rate supporting cast including Bill Pullman, Tim Robbins, and Anne Hathaway.