Wendell Potter spent 20 years shilling for the health care industry as a PR executive for CIGNA until a bad case of the scruples made him realize that, hey, killing people is kind of a dick move. Now one of those “whistle-blowers” you hear so much about, Potter comes to the First Parish Church, courtesy of Harvard Book Store, to discuss Deadly Spin, which outlines the specific tune he’s belting out on the fife of accusal. Namely, and please prepare yourself for this, insurance companies don’t really give that much of a shit about sick people. Cue gasps and thunder clap. [1446 Mass. Ave., Harvard Sq., Cambridge. 617.876.7772. 7pm/all ages/free. harvard.com]