Dora and Boots are beckoned by an odd noise that they keep hearing. So they come to investigate.
The episode begins with Dora speaking softly and loudly to the viewer. Boots later surprises Dora by saying "Loud!". The two of them hug, but they are suddenly shocked when they hear an odd sound, leading to Dora and Boots wondering what the sound is, and where the sound is coming from. The map told Dora and Boots that they have to cross the Noisy River, go through the Quiet Forest to get to Yellow Valley. They then reach the noisy river and listened. Dora and Boots have to figure out how to get across the noisy river, so they get a blue boat, but it is on the other side of the river. Dora and Boots tell Tico that they needed a boat, but Tico did not understand Spanish, so they had to shout out "Azul". Dora and Boots rode on the boat with Tico and managed to cross the Noisy River (though they do not like how loud it is). After getting across the noisy river, Dora and Boots had to go through the quiet forest. They bump into Big Red Chicken, who was sleeping, so they had to get a horn inside of Backpack. They then try to wake up the Big Red Chicken but are stopped by Swiper, who is stopped in time. Afterward, they attempt to wake him up again and he soon wakes up. Dora apologizes for waking up Big Red Chicken, who then unblocks the path for the duo, and explains that he was blocking the path to the quiet forest. Later, Dora and Boots see Swiper, who is asleep, so they had to tiptoe past him. Dora and Boots reached Yellow Valley and still wondered what the sound could be. They soon found out that it was Benny, who was having the hiccups, making that sound. They counted to ten to get rid of the hiccups, and soon Benny's hiccups were gone.
Ashley Fleming voiced by Isa appeared in the end credits, but Isa doesn't appear in this episode.
This is the first episode revealing that Dora has a mother. She taught Dora that the best way to get rid of hiccups to count to ten.
As Dora and Boots tell their favorite parts, flashbacks of how Dora and Boots tip-toed past Swiper and where Dora and Boots saw Benny at the bottom of Yellow Valley.
From now on, the theme song plays from the beginning during the credits instead of starting when Dora says, "We had such a fun trip today" (or something similar) and continuing when the credits start to roll.
This is the first episode where Dora and Boots sing the Travel Song but they do not say the places they are going to. They instead repeat "Hic-Boom-Ohhh!" four times at warp speed. Also, this is the first episode where they do not ask the question "Where are we going?", they instead ask "What's that sound?" and answer it with the sound "Hic-Boom-Ohhh!" instead of the last place.
Dora and Boots sing the Travel Song the second time, but the Big Red Chicken technically cut them off from singing it because they bump into him and he is blocking their way to get through the Quiet Forest, plus they already arrived at the second place they are going so quickly somehow.
Because of this, the full Travel Song was sung only once.
Dora & Boots wear their life jackets. But they do not say "Lifejackets! So we can be safe!"
This is the first episode to find Swiper.
The question "What's that sound?" asked by Dora and Boots in the Travel Song may be a reference to the 1999 episode "What's that Sound?" from "Blue's Clues".
After rowing over the Noisy River, the Fiesta Trio play their fanfare in a higher pitch to transition with the music already playing.
This is the first time (not counting every "We Did It" song) where Backpack's face is seen outside her segment.
This is the first episode where Map does not say "So here's what you tell Dora". He instead says "So you tell Dora". Beginning with the Season 2 episode Whose Birthday is It?, he says "So remember".
When Dora is yelling "Go Tico!", while Boots is yelling "Tico, come on, you can do it!", Boots' tail is missing.
When Dora and Boots ask "what's that sound?", the Fiesta Trio have seen lip syncing in gibberish because they don't have any audio.