Michael J Fox portrays Marty, who finds himself transported to 1955 when he discovers that his mentor, Doc Brown (Christopher Lloyd), died in 1885. Fortunately, the DeLorean is available, sending him back to the Old West with the goal of averting this tragedy. Upon arrival, he's unsure how to return; a challenge compounded by the local bully, Mad Dog (Tom Wilson), who immediately takes issue with this mild-mannered visitor from the city. Spielberg excels when crafting narratives like this one, drawing inspiration from Western films—particularly those featuring Clint Eastwood—resulting in an energetic and enjoyable adventure where Fox and Lloyd must survive while working out how to recharge the flux capacitor and return home. Wilson is excellent as the antagonist, and Mary Steenbergen provides a romantic interest for Doc as the plot progresses smoothly. The three movies complement each other well, and it’s fortunate they all chose to retire their cowboy hats after this installment. It remains an entertaining experience even thirty years later, featuring sharp, amusing lines; plenty of exciting action sequences, and consistently strong performances. A genuinely good time.

Source on TMDB