Doc Brown has decided to live in the Old West of the 1880's. But when he's in danger of meeting an untimely end, Marty travels back into the past to rescue him. There's just one problem: Doc is so smitten by a schoolteacher that he's become distracted. Now, it's up to Marty to keep Doc out of trouble, get the DeLorean running, and put the past, present and future on track so they can all get back to where and when they belong.

As a photographer with a broken leg, Stewart takes up the fine art of spying on his Greenwich Village neighbors during a summer heat wave. Things really begin to get hot when he suspects a salesman may have murdered his nagging wife and buried the body in a flower garden. He actively enlists the help of his girlfriend to investigate the highly suspicious chain of events

The Mousekewitz family discovers the streets of America are not all paved with cheese, and living in a mouse tenement does not offer the life they hoped for. Young Tanya dreams of becoming a famous singer, and Fievel wants to become a tough lawdog like his hero Wylie Burp. Lured out west by the crafty entrepreneur Cat R. Waul, Fievel discovers the evil gentleman's true plans to turn the settlers into mouse-burgers. Enlisting the aid of his cat friend...