We have recently had the release of "time travel" DVDs involving travel into the future (The Time Machine, Kate and Leopold), and the Time After Time DVD is just around the corner. But I'm looking for a DVD involving time travel by late-20th century or early-21st century people back into a past culture. There will, of course, be BTTF in just a few short months, but I'm looking for travel to a culture farther into the past, a culture more radically different than ours. Black Knight comes to mind, but I would like something where the producers have gone to great lengths in researching the past culture in order to reproduce its characteristics as accurately as possible (and a commentary track explaining such details would be very nice!) Does anyone know of any DVDs like this?