How many viewers were there for Children of Earth of "day one"?
CREATE TABLE "episodes" (
  "children_of_earth" text,
  "run_time" text,
  "writer" text,
  "director" text,
  "original_airdate" text,
  "viewers_including_hd_in_millions" text
);
SELECT "viewers_including_hd_in_millions" FROM "episodes" WHERE "children_of_earth"='\"day one\"';