 The radio courses proved to be so successful that when the television station WGBH went on the air in October 1951 they began broadcasting an Extension class every weekday at 3: 30 and 7: 30. The first course, offered by Robert G. Albion, was on European Imperialism on Monday and Thursday evenings. In the late 1960s, three of the televised courses were offered in the Deer Island Prison. Students who watched the courses on television could attend six "conferences" and take a mid-term and a final exam at Harvard in order to gain credit for the class. The television classes continued at least through the 1970s.
