Planned Parenthood v. Casey shaped modern abortion law in the United States. This 1992 case was a major challenge to Roe v. Wade and had the potential to overturn the right to abortions. With a drastically different Court membership, including several justices whose views on the issue were unknown, Court-watchers everywhere couldn't predict what would happen. Find out what happened in this episode as you listen to arguments and the unusual opinion announcement.

This arc leads up to the beginning of March 2016, when the Supreme Court will hear Whole Woman's Health v. Hellerstedt, a case about Texas' abortion laws.