CREATE TABLE table_21985 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original U.S. air date" TEXT, "Prod. code" TEXT, "Viewers  ( millions ) " TEXT)

who co-wrote Season 2, Episode 3?
SELECT "Written by" FROM table_21985 WHERE "No. in season" = '3'
SELECT "Written by" FROM "table_21985" WHERE "No. in season" = '3'