CREATE TABLE table_5257 ("Episode" FLOAT, "Title" TEXT, "Airdate  ( Canada ) " TEXT, "Airdate  ( USA ) " TEXT, "CBS airdate" TEXT)

What is the total number of episodes aired in Canada on 22 October 2004?
SELECT COUNT("Episode") FROM table_5257 WHERE "Airdate (Canada)" = '22 october 2004'
SELECT COUNT("Episode") FROM "table_5257" WHERE "Airdate (Canada)" = '22 october 2004'