Dora and Boots jump into a giant book of nursery rhymes to help a lost little lamb return to owner, Mary. Along the way, they check out lots of nursery rhymes and meet the characters.
Dora and Boots discover a giant sized nursery rhyme book sitting on the path, when a lost little lamb jumps out of the book looking for Mary. Dora, Boots, and Little Lamb enter the book into Nursery Rhyme Land. Now they have to check the Map find out how to get Little Lamb home. Map says that they have to go past the waterspout, jump over the moon to find Mary at her own house. Map mentions that there will be some star catching. After checking out other nursery rhymes and catching stars, they meet Peter Piper who had a bush of pickled peppers. Peter Piper, Dora, Boots, and Little Lamb pick out picked peppers while stopping Swiper. Afterwards, everyone took a taste on their pickled peppers, including Dora, who admits that she has not tasted a pickled pepper before but it is worth a try. So, she took a bite and realized that she loved the taste of it! After their snack, Dora and Boots got going with Little Lamb to the waterspout, where they sing "Itsy Bitsy Spider" to help Spider turn off the waterspout. Later, Dora, Boots, and Little Lamb check out another nursery rhyme called "Humpty Dumpty", who falls off his wall, and they play a jigsaw puzzle game to put him back together. After fixing Humpty Dumpty, they head off to find the moon where they check out another nursery rhyme called "Hey Diddle Diddle". They see a cow and hopped onto her. Dora, Boots, and Little Lamb tells the cow to "Jump" over the moon in Spanish. After jumping over the moon, it turns dark and Glowy helped light the way down. After riding the cow over the moon, Dora, Boots, and Little Lamb see 3 men in a tub-car. They splash into a mud puddle and got dirty, but they clean themselves up with soap they had gotten from Backpack. After reaching Mary's house, Dora, Boots and Little Lamb jump out and Little Lamb reunites with Mary. The episode ends with Dora and Boots singing "Mary Had a Little Lamb".
Unlike the TV version, the VHS and DVD version of this episode uses the Seasons 1-2 opening. Same thing occurred with The Lost City.
This also happened when this episode premiered in August 2003 only.
This is technically the only Season 3 episode to use the Season 1-2 opening (although it really used the Season 3-4 opening after the premiere).
Although this episode opens with the Season 3-4 opening on TV when it aired again after the premiere, this is the final episode to feature the seasons 1-2 opening in general (unless the home media and TV premiere version of this episode counts. If not, then León, the Circus Lion would be the last to do so).
When Dora, Boots, Little Lamb, and the three men in a tub are using the soap, Dora can be seen pulling back her ears and revealing shiny gold earrings.
This is the second episode not to feature Character Find at the end during the end credits.
However, he only sings the last stanza of the song until "¡Por Favor!" (or To the South Pole due to it being shown on VHS and DVD before airing on TV)
This is the first time Map sings "I'm the Map" four times instead of twice followed the Fiesta trio singing "He's the Map" four times instead of twice. The only other season 3 episodes with those happening are in Stuck Truck, Roberto the Robot, Dora's Pirate Adventure (extended version), and Louder! (which features the full version instead of just the last stanza).
When Map mentions about star catching, he does not say his usual line "Try and catch stars along the way!", he instead says "Don't forget to look for stars along the way!". He says that again in Dora Saves the Game.
He also does not say "So remember" before listing the places, he instead says "Now remember".
The 3 picture sequence where 1st square appears, Dora says 1st place, 2nd square appears, Dora says 2nd place and 3rd square appears, Dora says 3rd place, and the questions, "Where do we go first?" and "Where do we go next?" get put to permanent use as of this episode and Dora will no longer review what she has to do to get to her goal during the first part and ask "So next comes...?" (or something similar) during the second and third part of the picture pop up sequence.
This is the only episode where Dora and Boots visit Nursery Rhyme Land, which is very similar to Fairytale Land, except it is where Nursery Rhyme characters live.
Starting with the next episode, the Seasons 1-2 opening sequence theme song with two doors opening on their own, entering a room, and zooming up to the green computer will no longer be featured in anymore episodes (even the later episodes on home media) from now on.
Starting with this season, the copyright year reads "2002" which means this season was produced in 2002, along with the Season 2 episode The Lost City and the Season 4 episode Best Friends. This means that there are actually 25 episodes in Season 3 produced in 2002.
When Dora starts counting the people, she counts to 7 but instead of numbers 3-5 being counted, the number 7 is mistakenly counted for instead.