A Letter From Furthermost - S3.E20

Small sees Big enjoying a letter from his pen pal in Furthermost. He wants to receive a letter in the post, too. Big points out that Small needs to write and send a letter first. Big feels sorry for Small and has an idea. Not long after, Small finds a letter addressed to him on the doormat. When he opens the envelope he reads a short, sweet letter from his best friend Big. Small thinks this is the best letter ever.