"Doc" was zapped back seventy years to 1885 to the western town of Hill Valley in the past.Standing there alone, Marty received a 70 year-old Western Union message expressly delivered to him from "Doc" at that point in time...Jack: Uh, formerly a school-teacher...I""m a writer.Umm, teaching""s been more or less a way of making ends meet...I""m lookin"" for a change.General Manager Ullman explains that the regular season runs from "May 15 to October 30th and then we close down completely until the following May" - a period of six months when the deserted, off-season, snow-bound hotel is closed and inaccessible during the brutal, terrifying winter weather.The historic medical procedure was attended and witnessed by US generals, who were told that a new "Weapon X"" was being created.The ribald film is a clever combination of many elements: a spoof of 1920-30""s gangster films with period costumes and speakeasies, and romance in a quasi-screwball comedy with one central joke - entangled and deceptive identities, reversed sex roles and cross-dressing.