詳細介紹：馬丁（Michael J. Fox 飾）才回到現實世界與女友團聚，布朗博士（Christopher Lloyd 飾）就心急火燎地把他們帶到了30年後的未來世界，原來這一次是馬丁未來的兩個孩子因參與搶劫鋃鐺入獄，博士要攜馬丁一起阻止悲劇發生。
周旋一番後，兩個孩子被成功挽救，但三人回到現實世界後， ...
詳細介紹：Sara is a rising star at an animal rights organization. She goes undercover as an intern at a place where puppies are bred illegally. When the organization teams up with a local law enforcement to crack down on it, she is torn between doing her job and doing what's right.
