The final installment finds Marty digging the trusty DeLorean out of a mineshaft and looking for Doc in the Wild West of 1885. But when their time machine breaks down, the travelers are stranded in a land of spurs. More problems arise when Doc falls for pretty schoolteacher Clara Clayton, and Marty tangles with Buford Tannen.
A kidnapped boy strikes up a friendship with his captor: an escaped convict on the run from the law, headed by an honorable U.S. Marshal.
When dignified Albert Donnelly runs for Governor, his team moves to keep his slow-witted and klutzy younger brother, Mike, out of the eye of the media. To baby-sit Mike, the campaign assigns sarcastic Steve, who gets the experience of a lifetime when he tries to take Mike out of town during the election.
