How many million u.s. viewers watched the episode with a production code of 2t7004?
CREATE TABLE "table1_2828803_1" (
  "series_num" real,
  "title" text,
  "written_by" text,
  "directed_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_millions" text
);
SELECT "u_s_viewers_millions" FROM "table1_2828803_1" WHERE "production_code"='2T7004';