CREATE TABLE table_3708 ("Total #" FLOAT, "Episode #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

How many items appear in the written by column in episode 3?
SELECT COUNT("Written by") FROM table_3708 WHERE "Episode #" = '3'
SELECT COUNT("Written by") FROM "table_3708" WHERE "Episode #" = '3'