CREATE TABLE table_3437 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Director" TEXT, "Writer ( s ) " TEXT, "Airdate" TEXT)

name the most series number for season 22
SELECT MAX("Series #") FROM table_3437 WHERE "Season #" = '22'
SELECT MAX("Series #") FROM "table_3437" WHERE "Season #" = '22'