What is the first episode with a netflix episode code of s02e20?
CREATE TABLE "season_4_2004" (
  "series_ep" text,
  "episode" real,
  "netflix" text,
  "segment_a" text,
  "segment_b" text,
  "segment_c" text,
  "segment_d" text
);
SELECT MIN("episode") FROM "season_4_2004" WHERE "netflix"='S02E20';