简介：With the show's popularity soaring in the fourth season , former President Gerald Ford guest-starred as himself in 1983, along with his wife Betty and former Secretary of State Henry Kissinger. New characters included the charming and ambitious Farnsworth "Dex" Dexter , the scheming Public Relations assistant Tracy Kendall , the unscrupulous playboy Peter de Vilbis , and Blake's illegitimate African American half-sister, Dominique Deveraux . 　　The main storylines included a custody battle between Steven and Blake over Steven and Sammy Jo's son Danny, and a false accusation of illegal weapons dealings orchestrated by Alexis to ruin Blake's financial empire. 　　In the season finale, Fallon disappears just before her second wedding to Jeff as her car seemingly collides with a truck on a stormy night , while Alexis is arrested for the murder of Mark Jennings.…