Question: Name the number of number in series for production code of 06-04-621
SQL: SELECT COUNT("No. in series") FROM "1-1876825-7" WHERE "Production code" = '06-04-621';

Question: Name the total number of written by for original air date for May 8, 2005
SQL: SELECT COUNT("Written by") FROM "1-1876825-7" WHERE "Original air date" = 'May 8, 2005';