Cast of Back to the Future Part III

Michael J. Fox portrays Marty McFly, the adventurous teenager who finds himself in the Wild West, taking on the additional role of Seamus McFly, Marty's Irish ancestor.

Christopher Lloyd reprises his role as the eccentric inventor Doc Brown, who in this installment finds himself stranded in 1885 and in need of rescue.

Mary Steenburgen plays Clara Clayton, a schoolteacher in the Old West who captures Doc Brown's heart and becomes entwined in the time-traveling escapades.

Thomas F. Wilson embodies the antagonistic roles of Buford 'Mad Dog' Tannen, the ruthless outlaw from the past, and Biff Tannen from Marty's timeline.

Lea Thompson appears as Maggie McFly in the 1885 timeline and Lorraine McFly, Marty's mother, in the modern era, continuing her dual role from previous films.

Elisabeth Shue portrays Jennifer Parker, Marty's girlfriend, who finds herself in a series of unexpected situations as the time-traveling unfolds.

Matt Clark takes on the role of the Bartender who encounters Marty and Doc in the Wild West town, adding a touch of local color to the narrative.

Richard Dysart plays the Barbwire Salesman, a minor character who contributes to the Old West setting with his brief but memorable appearance.

Pat Buttram appears as one of the Saloon Old Timers, bringing a sense of authenticity and charm to the Wild West ambiance of the film.

Harry Carey, Jr. portrays a Saloon Old Timer, enriching the backdrop of the Old West with his presence and contributing to the film's period authenticity.

Dub Taylor takes on the role of a Saloon Old Timer, further enhancing the atmosphere of the Wild West and adding depth to the ensemble of supporting characters.

James Tolkan appears as Marshal Strickland, a no-nonsense lawman in both the Wild West and Marty's present, maintaining order across different timelines.