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.

When his boss is killed, Detroit cop Axel Foley finds evidence that the murderer had ties to a California amusement park called Wonder World. Returning to sunny Beverly Hills once more, Foley reunites with Detective Billy Rosewood to solve the case. Along with Billy's new partner, Detective Jon Flint, they discover that Wonder World is...

The young Bavarian princess Elisabeth, who all call Sissi, goes with her mother and older sister Néné to Austria where Néné will be wed to an emperor named Franz Joseph, Yet unexpectedly Franz runs into Sissi while out fishing and they fall in love.