CREATE TABLE table_74425 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( million ) " TEXT)

how many episodes in the serie were title 'the key
SELECT COUNT("No. in series") FROM table_74425 WHERE "Title" = 'The Key'
SELECT COUNT("No. in series") FROM "table_74425" WHERE "Title" = 'The Key'