By Stephen M. Silverman
Updated August 10, 1998 12:00 AM
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Reality continues to rule the TV airwaves, with CBS’s cast of castaways and Regis Philbin’s merry band of money-hungry quiz contestants monopolizing Mr. Nielsen’s Top 10. While fresh episodes of “Survivor” and “Who Wants to Be a Millionaire” captured the top spots — followed by “Big Brother” — a rerun of “The Practice” made a highly respectable showing, too. (A rating point represents 1,008,000 households, or 1% of the nation’s estimated 100.8 million TV homes.) The Top 10: