Then: Dan Frischman played Arvid Engen, the biggest nerd in a class full of socially questionable geniuses, on 'Head of the Class.' Before that role, Frischman appeared on shows like 'Webster' and 'The Facts of Life,' playing -- you guessed it -- nerds.

Now: Frischman got another co-starring role in the late '90s sitcom from Nickelodeon 'Kenan & Kel.' His acting career has slowed since then, but that doesn't mean Frischman is hurting for something to do. The 52-year-old owns a production company, and often works on projects with his 'Head of the Class' co-stars, and current TV producers Brian Robbins and Dan Schneider. He also performs magic -- his first love -- in shows around the country.

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