CREATE TABLE table_25664 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Prod. code" TEXT, "Viewers  ( millions ) " TEXT)

how many millions of spectator did has the episode whose prod.code was rp#213?
SELECT "Viewers (millions)" FROM table_25664 WHERE "Prod. code" = 'RP#213'
SELECT "Viewers (millions)" FROM "table_25664" WHERE "Prod. code" = 'RP#213'