CREATE TABLE table_3431 ("Series #" FLOAT, "Season #" FLOAT, "Title" CLOB, "Director" CLOB, "Writer ( s ) " CLOB, "Airdate" CLOB)

Who directed the episode with a title of ' old friend '?
SELECT "Director" FROM table_3431 WHERE "Title" = ' Old Friend '
SELECT "Director" FROM "table_3431" WHERE "Title" = ' Old Friend '