CREATE TABLE table_46239 ("Season" CLOB, "Episodes" FLOAT, "Season premiere" CLOB, "Season finale" CLOB, "Peak Series rating[ citation needed ]" CLOB, "Average series rating" CLOB, "DVD release date" CLOB, "Discs" FLOAT)

With a Season premiere of 23 july 2008 this show has what as the average episode?
SELECT AVG("Episodes") FROM table_46239 WHERE "Season premiere" = '23 july 2008'
SELECT AVG("Episodes") FROM "table_46239" WHERE "Season premiere" = '23 july 2008'