CREATE TABLE "table1_11230937_2" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "u_s_viewers_millions" text
);

Question: How many millions of viewers watched episode 15?
SQL: SELECT "u_s_viewers_millions" FROM "table1_11230937_2" WHERE "no_in_season"=15;

Question: How many millions of viewers watched the "Throwing Heat" episode?
SQL: SELECT "u_s_viewers_millions" FROM "table1_11230937_2" WHERE "title"='\"Throwing Heat\"';

Question: How many millions of viewers watched the episode directed by Anthony Hemingway?
SQL: SELECT "u_s_viewers_millions" FROM "table1_11230937_2" WHERE "directed_by"='Anthony Hemingway';