CREATE TABLE table_203_306 (id NUMBER, "no." NUMBER, "title" CLOB, "directed by" CLOB, "written by" CLOB, "original air date" CLOB)

which month aired the most episodes according to this chart ?
SELECT "original air date" FROM table_203_306 GROUP BY "original air date" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "original air date" FROM "table_203_306" GROUP BY "original air date" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY