CREATE TABLE table_21747 ("No. in series" CLOB, "No. in season" CLOB, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( millions ) " CLOB)

What number in the series are the episodes with production code 5016/5017?
SELECT "No. in series" FROM table_21747 WHERE "Production code" = '5016/5017'
SELECT "No. in series" FROM "table_21747" WHERE "Production code" = '5016/5017'