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TV's Top 5 Most Buzzed-About Moments

Bret Michaels tumbles at the Tonys, Saved by the Bell's Zack is back, Letterman vs. Sarah Palin and more

ZACK MORRIS RETURNS

What a good sport! When Mark-Paul Gosselaar appeared on Late Night with Jimmy Fallon, he dusted off his stone-washed jeans and came as his Saved By the Bell character, Zack Morris. "It's been a long strange trip since my days at Bayside," he said. "I can't complain – no more homework, no more books and no more Belding."