Two provocative programs exploring the prehistoric era shed new light on the mammoth creatures that stalked the Earth before man. From the long-running British series "Horizon" comes "Extreme Dinosaurs" (2000), which follows a paleontologist's surprising theories about a possible six-ton beast never before acknowledged by history, and "T. Rex: Warrior or Wimp?" (2004), which offers a controversial rethinking of the T. rex's infamous reputation. 100 min. total. Widescreen (Enhanced); Soundtrack: English Dolby Digital stereo; Subtitles: English (SDH).