How many number of series have a production code of 1.11?
CREATE TABLE "table1_2226817_2" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text
);
SELECT "no_in_series" FROM "table1_2226817_2" WHERE "production_code"='1.11';