Gary Merrill on July 28, 1950. That same day, he married Bette Davis, his co-star from "All About Eve", and adopted her daughter Barbara from a previous marriage. He and Davis adopted two more children, Margo and Michael, but they had a bitter divorce in 1960. Often politically active, he campaigned in 1958 to elect the Democrat, Edmund Sixtus Muskie, as governor of Maine. Merrill also took part in the Selma to Montgomery marches in 1965 to promote Black voter registration. In response to U.S. President Lyndon B. Johnson's Vietnam War policy, he unsuccessfully sought nomination to the Maine legislature as an
Margo Lane provide sufficient "vocal contrast". Margo was based on socialite Brenda Frazier and "You Can't Take It with You" star Margot Stevenson. The relationship between Lamont and Margo was modelled on the Thin Man film series. During World War II, Walter B. Gibson felt he could no longer write stories about spy rings, since they had now become a reality. Instead he focused on whodunits, which suited the Cranston persona of the Shadow. Thus the character of Margo came to the fore, and eventually became a permanent fixture in the stories, finally being promoted to a full agent. Margo appears in