Close-captioning throughout this episode misspells Tickety's name as "Tikkety."
Joe: Did you see that? The number one just said hi to me.
Joe is wearing a blue shirt in this episode.
This episode is the second of two on the "Blue Takes You to School" video and DVD.
Jennifer Twomey is credited as Jennifer Twomey Perello.
This episode also appears in online listings as simply "Numbers."
Mailtime Segment: Mailbox says that he has one letter for Joe. Joe's happy about this, since one is favorite number and he includes it in his "We Just Got a Letter" song. In the letter, we watch increasing numbers of kids as a song going from one to ten is played in the background.