CREATE TABLE table_36216 ("Series Ep." TEXT, "Episode" FLOAT, "Netflix" TEXT, "Segment A" TEXT, "Segment B" TEXT, "Segment C" TEXT, "Segment D" TEXT)

Which series episode has a netflix figure of s04e21?
SELECT "Series Ep." FROM table_36216 WHERE "Netflix" = 's04e21'
SELECT "Series Ep." FROM "table_36216" WHERE "Netflix" = 's04e21'