CREATE TABLE table_21987 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original U.S. air date" TEXT, "Prod. code" TEXT, "Viewers  ( millions ) " TEXT)

how many production codes were there for the episode that was 32 in the series?
SELECT COUNT("Prod. code") FROM table_21987 WHERE "No. in series" = '32'
SELECT COUNT("Prod. code") FROM "table_21987" WHERE "No. in series" = '32'