Jane, the organization that Julia and Gerard worked for was a real underground organization (known as the Jane Collective) that provided abortion services to women from 1969 until 1973, when the Supreme Court's ruling in Roe v. Wade made abortions legal throughout the U.S. The real Jane Collective operated in Chicago, however, not Philadelphia.
The song "Whiter Shade of Pale" by Procol Harum was also used in the episode One Small Step.
Julia Hoffman and Gerard Gary were murdered on June 3, 1969.