Saved by the Bell's 20-Year Reunion!

From Zack & Kelly to A.C. Slater, PEOPLE catches up with Bayside's Class of '89!

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ELIZABETH BERKLEY, 37

Berkley, who now appears on CSI: Miami, had some of the show's most memorable moments as tightly wound feminist Jessie Spano. "The 'I'm so excited!' episode [when Jessie uses 'caffeine pills'] was so extreme," she says. And the hair! "I practically went through a can of hairspray a show."