Michael J. Fox Marty McFly / Seamus McFly Christopher Lloyd Emmett Brown Mary Steenburgen Clara Clayton Thomas F. Wilson Buford "Mad Dog" Tannen / Biff Tannen Lea Thompson Maggie McFly / Lorraine McFly Elisabeth Shue Jennifer Parker Matt Clark Bartender Richard Dysart Barbwire Salesman Pat Buttram Saloon Old Timer Harry Carey, Jr. Saloon Old Timer Dub Taylor Saloon Old Timer James Tolkan Marshal Strickland Marc McClure Dave McFly Wendie Jo Sperber Linda McFly Jeffrey Weissman George McFly Christopher Wynne Buford Tannen's Gang / Needles' Gang Sean Sullivan Buford Tannen's Gang Mike Watson Buford Tannen's Gang Hugh Gillin Mayor Burton Gilliam Colt Gun Salesman Bill McKinney Engineer Donovan Scott Deputy Flea Needles J.J. Cohen Needles' Gang Ricky Dean Logan Needles' Gang Marvin J. McIntyre Mortician Dean Cundey Photographer