On a night with a blue moon filling the sky, a moon fairy named Moona appears outside the Blue's Clues house and tells Blue a story about her birth under a blue moon, with a key that will unlock her greatest gift. We follow Moona to find this key and once we have it, a great hunt all over the Blue's Clues house begins to find the lock that it fits. Once that's found, the key unlocks Blue's Room, a special playroom where she is able to talk. Here, Blue can meet lots of new friends, but the most important thing about it is that she can communicate orally. We take part in games such as Boogie Woogie, Dress Up Chest, Silly Seat and Doodle Board.
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This was the last episode to use the previous season's intro, but in variation. Instead of Steve's/Joe's house, the bush, and the tree swing popping up, once Blue opens the book, it shows a blue crescent moon in a darkish blue sky. Also, instead of Blue skidooing into the Blue's Clues book, she instead wobbles in excitement, and the scene in the book zooms in full frame, and the episode continues from then on.
Due to the plot of the episode, this episode does not include playing Blue's Clues, Mailtime, Video Letter, and Skidoo segments in this episode.
This is the first episode for Season 6, and to air in 2004.
This is the first episode to have Moona appear for this season.
This is the only episode of season 6 not to use the Goodbye Song. It would begin to be heard in the next episode.
This is the last time Joe wears his blue squares shirt.
This is the first episode combining the traditional Blue's Clues elements with the Blue's Room segment.
As Blue grew up, her ears started getting longer.
Starting with this episode, Victoria Pontecorvo provides Blue's voice in the Blue's Room segments, while Leslie Carra-Rudolph does the puppetry.
When the scene of Blue reading a book and listening to music is shown, the shortened parts of the "So Long Song" can be heard.
The instrumental version of "Go, Blue, Go, Find the Lock For Your Key" was heard in the closing credits (which plays in ridiculous, rapid speed).
Parts of the story from the legend are similar to the story heard in Blue the puppy was actually suppose to be an orange cat.
According to Moona, all other dogs act as they do for real and are not colored like in animation. It is possible that there could be a special moon for Magenta and Green Puppy, but since they are not main characters of the show, their moons are not shown or mentioned.
This is the first episode where Sean Hanley voices Slippery Soap.
This is the first episode where Jansen Panettiere voices Periwinkle.
The voice of Moona was done by Christiana Anbri.
A drawing of "the cow who jumped over the moon" from "Blue's ABCs" can be seen on a picture on the bedroom wall.
It looks exactly the way Steve drew them as clues.