CREATE TABLE "table1_29803475_3" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_million" text
);

Question: how many episodes in the serie were title "the key"
SQL: SELECT COUNT("no_in_series") FROM "table1_29803475_3" WHERE "title"='\"The Key\"';

Question: what is the name of the episode directed by james bobin
SQL: SELECT "title" FROM "table1_29803475_3" WHERE "directed_by"='James Bobin';

Question: who directed the episode that have 0.25 million u.s viewers
SQL: SELECT "directed_by" FROM "table1_29803475_3" WHERE "u_s_viewers_million"='0.25';