CREATE TABLE table_17393 ("No. in series" CLOB, "No. in season" CLOB, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB)

Who directed the episode with a production code 3ADK-03?
SELECT "Directed by" FROM table_17393 WHERE "Production code" = '3ADK-03'
SELECT "Directed by" FROM "table_17393" WHERE "Production code" = '3ADK-03'