What was the rating of the episode Wonder Drug?
CREATE TABLE "episode_ratings" (
  "episode_no" text,
  "airdate" text,
  "time" text,
  "ratings_5_capital_cities" real,
  "timeslot_rank" text,
  "overall_nightly_rank" text
);
SELECT "ratings_5_capital_cities" FROM "episode_ratings" WHERE "episode_no"='wonder drug';