In what episode did heat 1 take place?
CREATE TABLE "table1_24051050_1" (
  "episode" real,
  "contest" text,
  "original_airdate" text,
  "challengers_female" text,
  "challengers_male" text,
  "events" text
);
SELECT "episode" FROM "table1_24051050_1" WHERE "contest"='Heat 1';