CREATE TABLE table_202_127 (id DECIMAL, "#" DECIMAL, "title" TEXT, "directed by" TEXT, "written by" TEXT, "original air date" TEXT, "production\ code" TEXT)

which director has the most titles accredited to them ?
SELECT "directed by" FROM table_202_127 GROUP BY "directed by" ORDER BY COUNT("title") DESC LIMIT 1
SELECT "directed by" FROM "table_202_127" GROUP BY "directed by" ORDER BY COUNT("title") DESC NULLS LAST LIMIT 1