The Great Courses catalog has a variety of lectures given by numerous professors, but this dandy caught my eye:
Roman History
$519.95 on sale for $109.95??? I may have to check this out!
48 - half hour lectures spanning from 200BC to 200AD on nearly every aspect of Roman culture.
There are also lectures on many various different subjects such as physics, calculus, philosophy, and on how to argue. The latter may do well for a lot of people here.