Question: which is the production code when the number of the episode in series is 87? 
SQL: SELECT "Prod. code" FROM "1-27622417-1" WHERE "No. in series" = 87.0;

Question: how many directors had the episode called "Magic Unmasked"?
SQL: SELECT COUNT("Directed by") FROM "1-27622417-1" WHERE "Title" = '"Magic Unmasked"';

Question: what is the number of the episode in the series whose production code is 405?
SQL: SELECT "No. in series" FROM "1-27622417-1" WHERE "Prod. code" = '405';

Question: when was the premiere of the episode whose production code is 415? 
SQL: SELECT "Original U.S. air date" FROM "1-27622417-1" WHERE "Prod. code" = '415';

Question: who were the writers in the episode whose production code was 411? 
SQL: SELECT "Written by" FROM "1-27622417-1" WHERE "Prod. code" = '411';

Question: who were the director of the episode whose number in the season is 17? 
SQL: SELECT "Directed by" FROM "1-27622417-1" WHERE "No. in season" = 17.0;