Leave it to Ted Koppel to quit "Nightline" in the same wry, superior way he began it 25 years ago. His choice for a valedictory broadcast is not a video scrapbook crammed with slow-motion clips and misty testimonials from world leaders. Nor is it a foreboding look forward at what network news will be like without him.

The show is a tribute to Mr. Schwartz's indomitable spirit, but the broadcast also serves as a veiled showcase for Mr. Koppel's proud, contrarian personality. He built his career on being different - professorial, not telegenic; cerebral, not entertaining; coolly amusing, not genial or avuncular. "A Tuesday With Morrie" tonight is Koppel's last chance on ABC to épater les bourgeois.

When Mr. Cooper asked Mr. Koppel why he was leaving ABC News, Mr. Koppel gave a dry smile and replied, "Why not?"