Blue's Clues

First appearance of Green Puppy. Although Adam Peltzman, who also writes and story edits for though, is credited as one of "Steve's Friends" in this episode, he is listed here as a guest star because earlier seasons of the program use a generic credits screen that doesn't credit voices by character.

Angela Santomero is credited as Angela C. Santomero, Carly Ann Lycke is credited as Carly Lycke and Amanda Musychka is credited as Amanda Murychk.

Mailtime Segment: Steve thinks that getting a letter might cheer up Blue. We learn that delivering the mail makes Mailbox feel proud. In the letter, a group of kids talk about and act out feelings. One of them demonstrates a happy face. Another says that her dog makes her really happy. There's a girl that's afraid of the dog and one that gets angry when kids pushe her. A boy demonstrates an angry face. A girl shows what a scared face looks like and finally we see a girl with a happy face.