Blue Prints" is the unaired pilot episode of .
Although the pilot was never aired, its plot was adapted into the series' first official episode, "
Four characters—Blue, Steve, Sidetable, and Mr. Salt—are confirmed to have appeared in the pilot. It can be assumed that the other residents of the Blue's Clues house (minus Paprika and Cinnamon) appeared, as they are present in "Snack Time."
Clips of the pilot were shown as part of the special " Behind the Clues: 10 Years with Blue". These clips are the only portions of the pilot available to the public.
Steve's shirt was a short-sleeved red polo. In the first official episode, it was changed to a long-sleeved green striped shirt.
Sidetable was yellow instead of red. She resembled a drawing made with crayons in the pilot, while she appears to be made of clay in the series.
Nick Balaban, the voice of Mr. Salt, originally gave his character a New York accent before deciding he should be French.
Early concepts showed Blue as a male cat. According to "Behind the Clues", her species and gender were changed after Nick Jr. executives said that they already greenlit a show starring a cat.
The animation of the Blue's Clues house is different from the series, but the Thinking Chair is the same one used in further episodes.
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