CREATE TABLE table_27185 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "U.S. viewers  ( millions ) " TEXT)

What is the number in the series that was titled 'Past Tense'?
SELECT "No. in series" FROM table_27185 WHERE "Title" = 'Past Tense'
SELECT "No. in series" FROM "table_27185" WHERE "Title" = 'Past Tense'