Susan Lacy, who ran American Masters for so many years, is the woman behind this documentary, which is original in structure and touching in its honesty. Instead of dividing Jane Fonda’s life into segments devoted to her films, or her various causes, the first four of Five Acts in the title are assigned to prominent men in her life: father Henry, and husbands Tom Hayden, Roger Vadim, Ted Turner. The final act, fittingly, is her own. And while the films in which Fonda starred are show