 While calling her husband to tell him the good news, she is in a massive auto accident where she hits an oil tanker and is severely burned in a subsequent fire.While recovering from her burns, she decides to get away from the Ewings and everyone else, including her son, disappear and divorce Bobby for a second time.Pam made a brief appearance in the season 12 premiere, with a different appearance as a result of plastic surgery (which also doubled as an explanation for Margaret Michaels playing the role, rather than Victoria Principal).