Name the number in series for number 38
CREATE TABLE "table1_18335117_5" (
  "no_overall" real,
  "no_in_series" real,
  "title" text,
  "director" text,
  "writer" text,
  "original_air_date" text,
  "production_code" real
);
SELECT MIN("no_in_series") FROM "table1_18335117_5" WHERE "no_overall"=38;