Liza Schoenfein

Jay Leno (below, left) and Rush Limbaugh? Columbia hopes ``The Newz,'' its upcoming late-night entry, capitalizes on the growing interest in the daypart. The legacy of Dave ( and Ted and Johnny) Late-night TV has turned into a programming nightmare for many of TV executives and show hosts, thanks in part to the stability of David Letterman's programs, Ted Koppel and ABC's " Nightline," and Johnny Carson's term on NBC's " The Tonight Show" Here's a partial list of late night shows that have died since Mr. Letterman's emergence in 1982. STAYING UP LATE BUT SOME WONDER IF ADVERTISERS WILL PAY PREDICTED HIGHER UNIT COSTS

06.13.94 @ 12:00 AM EDT

AD-DIRECTED CHANNELS A REALITY PROGRAM AROUND `PASSIONS THAT PEOPLE HAVE FOR VARIOUS ACTIVITIES'

04.11.94 @ 12:00 AM EDT