These are the late night schedules for the four United States broadcast networks that offer programming during this time period, from September 1998 to August 1999. All times are Eastern or Pacific. Affiliates will fill non-network schedule with local, syndicated, or paid programming. Affiliates also have the option to preempt or delay network programming at their discretion. Legend Schedule Monday-Friday Note: NBC Nightside was cancelled in September 1998 Saturday By network ABC Returning series ABC World News Now ABC World News This Morning Nightline Politically Incorrect with Bill Maher Not returning from 1997-98: ABC in Concert CBS Returning series CBS Morning News Late Show with David Letterman The Late Late Show with Tom Snyder Up to the Minute New series The Late Late Show with Craig Kilborn Fox Returning series MADtv NBC Returning series Friday Night Late Night with Conan O'Brien Later NBC News at Sunrise Saturday Night Live The Tonight Show with Jay Leno Not returning from 1997-98: NBC Nightside United States late night network television schedules 1998 in American television 1999 in American television