猪猪侠和阿五带着海豚伙伴聪聪继续执行南海生态调查任务。任务资料往往让人摸不着头脑,但他们凭着旺盛的好奇心、无边的想象力,总是充满动力去解开一个又一个谜题。然而坏坏博士为了赢过猪猪侠,总是有意无意地在旁边捣乱,但猪猪侠他们总是能凭着勇气和智慧,与坏坏博士斗智斗勇,最终既保护了海洋环境和目标生物,同时将生态资料完整地记录下来。。7-year-old Bertil's parents are at work and Bertil are home alone and bored. He is the only child in the family since his sister Martha died of an illness. But everything changes when he meets little Nils Karlsson Pyssling and they become friends. Nisse who lives in the basement in a room he rents from the rat Tjofsan,wich is cruel.。