Hill Valley Courthouse, November 12, 1955. Startled by Atem, his universal group of animal/pony friends/allies (realistic cartoony CGI with CGI cartoony eyes) and Marty's improbable arrival after the severe electrical thunderstorm in Part II. Doc is in for another surprise when he discovers that the violent electromagnetic lightning bolt blast that hit the DeLorean caused a jigowatt overload which scrambled the time circuits, activated the flux capacitor and accidentally sent 1985 Emmett back to January 1, 1885. However the overload shorted out the time circuits and it destroyed the flying circuits that means the DeLorean will never fly again. As a result, with the DeLorean time machine in terrible shape,Atem, his universal group of animal/pony friends/allies (realistic cartoony CGI with CGI cartoony eyes) and Marty leaps nine decades back to save Doc from a fatal encounter with trigger-happy outlaw Buford "Mad Dog" Tannen when Atem and Marty will go under aliases as John Wayne and Clint Eastwood. But no one died of old age in the Wild West. And as Doc and the flamboyant stranger from the sky struggle to restore the delicate time/space continuum, sweet romantic entanglements further complicate things. However, the plan is to patch up the dusty DeLorean and return to 1985 in one piece. But using only 1885 Hill Valley's primitive means, how can the intrepid time-travellers get back to the future one last time?
