Out of her hundreds of TV appearances, Martha Smith is perhaps best known as "Francine Desmond", intelligence agent (and nemesis of star Kate Jackson) on the CBS series "Scarecrow and Mrs. King" (1983). Raised in Farmington, MI, Martha--an honor student with a mention in "Who's Who of American Students"--enrolled in Michigan State University at 17 to study psychology. She soon became an in-demand model and spokeswoman, whose travel demands uprooted her from her studies. She was "discovered" by a scout for "Playboy" magazine, selected as a cent…