What was the production code for episode #1?
CREATE TABLE "table1_20726262_2" (
  "no_in_series" real,
  "title" text,
  "directedby" text,
  "writtenby" text,
  "originalairdate" text,
  "production_code" text
);
SELECT "production_code" FROM "table1_20726262_2" WHERE "no_in_series"=1;