How many viewers did Episode 5 have?
CREATE TABLE "table1_12919003_2" (
  "no" real,
  "episode" text,
  "writer" text,
  "director" text,
  "viewers_millions" text,
  "original_airdate" text
);
SELECT "viewers_millions" FROM "table1_12919003_2" WHERE "episode"='Episode 5';