15 年前
视频简介
NOVA: Mysteries of Sleep Like virtually every other animal, humans need sleep to survive. But why? What do we gain from spending nearly a third of our lives in such a defenseless state? And what's at stake if we sleep poorly? The functions of sleep have long been something of a mystery. But now scientists are peering deep into the brain to see what happens while we snooze. One ...。犯人战士尤里•伯伊卡（斯科特阿金斯饰）霸气回归!依然要参加格斗赛!然而这一部里，当他把对手解决掉后，对手意外死亡，这也让他重新审视自己参赛的意义，尤其发现遗孀被幕后黑手控制，他要为她的自由而战!不过这次的对手更难对付了!。
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