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

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'