CREATE TABLE table_2564 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

Who directed episode 266 in the series?
SELECT "Directed by" FROM table_2564 WHERE "Series #" = '266'
SELECT "Directed by" FROM "table_2564" WHERE "Series #" = '266'