"Legacy," the first feature on this Dolby Digital DVD, offers the following four options: Play; Direct Scene Access (in other words, a chapter index); Biography and Pivotal Events, offering one-screen bios and descriptions of famous people and happenings of the 20th century; and a short trivia quiz (text only) covering facts mentioned in the film. "Into the Unknown," the second feature, offers the same four options. Sound in both episodes is confined almost entirely to the narrative. Picture quality depends largely on whatever historical footage is being featured in a given chapter. A two-page glossy booklet tucked into the plastic DVD case offers advertising and a chapter index. ~ Craig Chalquist, All Movie Guide