How many millions of viewers watched the episode directed by Christine Moore?
CREATE TABLE "table1_23255941_1" (
  "episode_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "viewers_in_millions" text
);
SELECT "viewers_in_millions" FROM "table1_23255941_1" WHERE "directed_by"='Christine Moore';