CREATE TABLE table_23464 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" FLOAT, "U.S. viewers  ( millions ) " CLOB)

How many different series number does the episode titled 'Skate or Die' have?
SELECT COUNT("No. in series") FROM table_23464 WHERE "Title" = 'Skate or Die'
SELECT COUNT("No. in series") FROM "table_23464" WHERE "Title" = 'Skate or Die'