CREATE TABLE table_29639 ("Season" CLOB, "Episodes" FLOAT, "Timeslot  (  EST  ) " CLOB, "Season premiere" CLOB, "Season finale" CLOB, "TV season" CLOB, "Rank" CLOB, "Viewers  ( in millions ) " CLOB)

What season premiere date had a finale on may 22, 2007?
SELECT "Season premiere" FROM table_29639 WHERE "Season finale" = 'May 22, 2007'
SELECT "Season premiere" FROM "table_29639" WHERE "Season finale" = 'May 22, 2007'