Mildred Natwick guest stars as Agatha, the elderly, freewheeling aunt of waitress Vera (Beth Howland). While motorcycling her way to Mexico, Aunt Agatha makes a stopover at Mel's Diner. The old lady's footloose-and-fancy-free outlook on life prompts Vera to experience an epiphany--and to join Agatha on her Southbound odyssey. ~ Hal Erickson, Rovi