CREATE TABLE table_3681 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "U.S. viewers  ( million ) " CLOB)

When did the episode written by Abe Sylvia originally air?
SELECT "Original air date" FROM table_3681 WHERE "Written by" = 'Abe Sylvia'
SELECT "Original air date" FROM "table_3681" WHERE "Written by" = 'Abe Sylvia'