Axel Foley returns to the land of sunshine and palm trees to investigate the near-fatal shooting of police Captain Andrew Bogomil. With the help of Sgt. Taggart and Det. Rosewood, they soon uncover that the shooting is associated with a series of "alphabet" robberies masterminded by a heartless weapons kingpin—and the chase is on.

Marty and Doc are at it again as the time-traveling duo head to 2015 to nip some McFly family woes in the bud. But things go awry thanks to bully Biff Tannen and a pesky sports almanac. In a last-ditch attempt to set things straight, Marty finds himself bound for 1955 and face to face with his teenage parents -- again.

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.

Veteran catcher Crash Davis is brought to the minor league Durham Bulls to help their up and coming pitching prospect, "Nuke" Laloosh. Their relationship gets off to a rocky start and is further complicated when baseball groupie Annie Savoy sets her sights on the two men.

Tobi and Achim, the pride of the local crew club, have been the best of friends for years and are convinced that nothing will ever stand in the way of their friendship. They look forward to the upcoming summer camp and the crew competition. Then the gay team from Berlin arrives and Tobi is totally confused. The evening before the races...