CREATE TABLE "table1_27776266_1" (
  "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: What was the production code of the episode no. 55 in the series?
SQL: SELECT "production_code" FROM "table1_27776266_1" WHERE "no_in_series"=55;

Question: What was the production code of the episode with an audience of 14.79 million in the US?
SQL: SELECT "production_code" FROM "table1_27776266_1" WHERE "u_s_viewers_million"='14.79';

Question: Who directed the episode with an audience of 14.11 million?
SQL: SELECT "directed_by" FROM "table1_27776266_1" WHERE "u_s_viewers_million"='14.11';

Question: What was the title of the episode with a production code of 3x6404?
SQL: SELECT "title" FROM "table1_27776266_1" WHERE "production_code"='3X6404';