CREATE TABLE table_10622 ("Episode #" FLOAT, "Title" CLOB, "Airdate" CLOB, "Rating  ( Millions ) " CLOB, "Rank" CLOB)

On what date did the episode 'Petra-Gate' air?
SELECT "Airdate" FROM table_10622 WHERE "Title" = 'petra-gate'
SELECT "Airdate" FROM "table_10622" WHERE "Title" = 'petra-gate'