This is the only episode where Joe changes his shirt multiple times.
The first was when Joe changed into an orange shirt after singing how to play Blue's Clues. The second was when Joe was in a yellow shirt at the end of the video letter. Finally, Joe had a red shirt on before drawing the third clue.
In this episode, Joe starts with his green shirt, then Joe switches to an orange shirt before switching back to his green shirt, then he switches to a yellow shirt before skidooing and switching to a red shirt after skidooing and finally switching back to his green shirt.
When Joe says "We just figured out Blue's Clues", the audio is taken from the Season 4 finale Steve Goes to College except it is sped up and high pitched.
The Viewer is portrayed as an orange stick figure in the Portrait of Pals.
In the UK version, when Kevin draws the color yellow, the footage is similar to Joe's except it's mirrored.
Also in the UK version, when Kevin pulled out His Notebook in the First and Second Clues, a black crayon with a green checker wrapped were used But at the Last Clue, The Black Crayon with a Red checker wrapped crayon was used.
Joe wears a green, orange, yellow and red squared shirts in this episode. But not a blue or purple squared shirt.
At the end of the opening sequence, Blue enters the Blue's Clues house through her special door. Joe shows up outside and leads us over to Blue, who has apparently actually been outside for some time.
Sidetable says that her favorite color is purple in The Big Book About Us. Here, she states it is orange.
Joe pulled out his Handy Dandy Notebook with a green-wrapped crayon, but when he drew the third clue, the wrapper on the crayon turned red to match his shirt, then after he drew the clue, the wrapper on the crayon was green again.