CREATE TABLE "table1_26748252_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_in_millions" text
);

Question: How many millions of people watched the episode "The Grandfather"?
SQL: SELECT "u_s_viewers_in_millions" FROM "table1_26748252_1" WHERE "title"='\"The Grandfather\"';

Question: How many people wrote the episode with 3.40 million U.S viewers?
SQL: SELECT COUNT("written_by") FROM "table1_26748252_1" WHERE "u_s_viewers_in_millions"='3.40';