CREATE TABLE "table1_22347090_6" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);

Question: Who wrote the episode that has a production code 3x7557?
SQL: SELECT "written_by" FROM "table1_22347090_6" WHERE "production_code"='3X7557';

Question: How many directors are there for the episode that had 1.59 million U.S. viewers?
SQL: SELECT COUNT("directed_by") FROM "table1_22347090_6" WHERE "u_s_viewers_million"='1.59';

Question: What is the production code for the episode that had 1.32 million U.S. viewers?
SQL: SELECT "production_code" FROM "table1_22347090_6" WHERE "u_s_viewers_million"='1.32';

Question: What episode number in the series had a production code of 3x7554?
SQL: SELECT MIN("no_in_series") FROM "table1_22347090_6" WHERE "production_code"='3X7554';

Question: What is the name of episode number 41 in the series?
SQL: SELECT "title" FROM "table1_22347090_6" WHERE "no_in_series"=41;