迪士尼公司旗下专门摄制自然纪录片的子公司迪士尼自然推出的又一力作。影片追踪纪录了一个棕熊家庭在一年四季变换中的生活点滴。在冰雪初融的阿拉斯加，棕熊一家从冬眠中醒来，走出洞穴面对严寒，两头新出生不久的小熊在父母的带领下学会了不少生存的本领。春去夏至，棕熊们费力捕食鲑鱼，也必须对付来自敌对方公熊和捕食者的攻击，同时无所不在的狼群也预示着致命的威胁。《熊世界》捕捉到了在狂野的阿拉斯加生命的动感与生存的悬念，那股生命的尊严、残酷与壮美令人窒息。本片由好莱坞著名喜剧明星约翰·C·赖利担任配音旁白。
导演（3）
Alastair Fothergill is currently an Executive Producer in the BBC Natural History Unit where he started in 1983. He has been an important part in creating many award-winning and globally important wildlife programmes, including the Natural World and Wildlife on One strands, and Reefwatch in 1988, where he was one of the team that created the first live broadcasting from beneath the sea and then went on to work with Sir David Attenborough on Trials of Life in 1990. His relationship with Sir David continued with the epic Life in the Freezer in 1993, celebrating the wildlife of the Antarctic, and he has been the crucial link in the making of many other landmark series. These can be seen on the BBC Earth website, with clips from Life in the Freezer, celebrating the wildlife of the Antarctic and Blue Planet, on the world’s oceans. He was also Series Producer for the landmark series Planet Earth and subsequently co-directed the cinematic version, Earth, to worldwide acclaim. He is currently Executive Producer for the Unit’s next major series, Frozen Planet, to be broadcast in 2011. In addition to his work for the NHU, Alastair has his own production company and is currently directing two cinematic movies for Disney Nature.
演员（1）
手持一个家常马克杯，长着一头乱糟糟的卷发，约翰·克里斯托弗·赖利扮演了众多令人动情的“普通男人”角色。他是他爱尔兰天主教家庭六个孩子中的第五个，在芝加哥的西南部长大。8岁便在业余舞台上表演，他对后随后在古德曼喜剧学校受训，并最后成为芝加哥有名的史戴芬沃夫剧团的成员。他因为演出越战电影《越战创伤》中的一个小角色，而在电影方面取得突破。90年代，赖利展现了他令人炫目的才华，演出了许多电影。2002年，他因为在《芝加哥》里扮演了蕾妮·齐薇格的傻气丈夫而获得了金球奖和奥斯卡奖的最佳男配角提名，但可惜的是都没能获奖。同年他在备受好评的《时时刻刻》中也有出色表现。接下来的几年里赖利在不少影片中出演配角，表现出驾驭多种角色类型的卓越能力。但在好莱坞并非所有优秀的演员都能获得认可，好在赖利很快在喜剧领域站稳了脚跟。他主演的《永不止步：戴维·寇克斯的故事》、《两兄弟》、《升职》等喜剧片获得不少好评，同时也跟威尔·法瑞尔等一线明星并驾齐驱。