CREATE TABLE table_25745 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" FLOAT, "U.S. viewers  ( millions ) " TEXT)

If the number in the season is 22, what is the original air date?
SELECT "Original air date" FROM table_25745 WHERE "No. in season" = '22'
SELECT "Original air date" FROM "table_25745" WHERE "No. in season" = '22'