自然探險(xiǎn)家史蒂夫·巴克肖（Steve Backshall）致力于探索人類從未親眼看到過的地球盡頭，但他只接觸到了表層。第二季記錄了Steve探索這個(gè)星球不為人知的更深的角落。為了完成找到拯救野生動(dòng)物未來生存狀況的新事物，Steve和他的專家團(tuán)隊(duì)前往墨西哥的東太平洋與鯊魚深潛，深入非洲人類從未踏入的叢林尋找猿類，劃著俄羅斯遠(yuǎn)東的白水進(jìn)入棕熊領(lǐng)地的中心，繩降到沙特阿拉伯古老沙漠的深處，探索一個(gè)未繪制的，未知的火山地下世界，并爬上吉爾吉斯斯坦的Djangart山脈，尋找瀕臨滅絕的雪豹。在這個(gè)瞬息萬(wàn)變的星球上，他們因?yàn)榫薮蟮囊靶亩铝朔浅４蟮馁€注。

When a massive explosion tears a hole in a 747 over Hawaii, nine passengers strapped to their seats are sucked out of the cabin. With two engines on fire, the flight crew somehow manages to turn the crippled plane around to land in Honolulu. And though investigators immediately suspect an act of terrorism is to blame, the search for answers ultimately leads to a deadly short ci...