On the fifth leg of his 1,000-mile trek, explorer Benedict Allen and his team reach the hometown of his two native guides, where they will leave him to go on alone. Has Allen learnt enough to lead his huskies on to the shifting ice floes of the Bering Strait? On his first night alone, his dogs begin to howl -there is an intruder in the camp. : Producer John Hesling ; Executive producer Bob Long 413 i