Motifs in the James Bond film series the degree to which Bond girls are pivotal to propelling the plot forward varies from one film to the next. Five of the Bond girls are "bad" girls (or at least working for the villain) who turn "good" (or switch sides) usually due to Bond's influence. Bond has fallen in love with only Tracy di Vicenzo in "On Her Majesty's Secret Service" and Vesper Lynd in "Casino Royale", but both of them die at or near the end of the respective films. Roald Dahl, a screenwriter of "You Only Live Twice", said he was given a formula to work to
Bond girl to have married other men (in "From Russia With Love" and "The Man With the Golden Gun" respectively), and in "Doctor No", Bond briefly wonders about Solitaire. In Licence Renewed it is specifically noted in an epilogue that Bond and Lavender Peacock stopped seeing each other after a brief romance. A unique case is Mary Goodnight, who appears in the novels, "On Her Majesty's Secret Service" and "You Only Live Twice" as Bond's secretary, before becoming a full-fledged Bond girl in "The Man With the Golden Gun". The role of a Bond girl, as it has evolved in the films,