Question: Which episode aired in the USA on 20 May 2005?
SQL: SELECT "Episode" FROM "2-15201772-3" WHERE "Airdate (USA)" = '20 May 2005';

Question: What is the total number of episodes aired in Canada on 22 october 2004?
SQL: SELECT COUNT("Episode") FROM "2-15201772-3" WHERE "Airdate (Canada)" = '22 october 2004';

Question: What is the CBS airdate of the episode with a number under 70 with a USA airdate of 1 April 2005?
SQL: SELECT "CBS airdate" FROM "2-15201772-3" WHERE "Episode" < 70.0 AND "Airdate (USA)" = '1 April 2005';