What's That Sound?/Trivia

Trivia

• The main music of the series is muted during the opening scene where Steve asks the viewers to find Blue and throughout the closing credits.
• This is the only episode to not have any form of music during "The So Long Song".
• This is the only episode to not use any form of music in the credits, just a bunch of sounds heard from presumably right from the couch used in the last scene of this episode.
• This is the third time Steve wears his tan shoes.
• This was the only episode to use hippos in the Nick Jr. logo.
• This is the first episode since Season 1 to have Blue appear four times during the credit sequence. The other times were Animal Behavior! and Hide and Seek.
• Steve identifies Sidetable Drawer's sound as "the sound of you opening the drawer." He should have said "the sound of you opening yourself," since she is supposed to be herself, not just the drawer.
• The reason Blue heard the storm before it even arrived is because dogs have much better hearing than humans and can, therefore, hear sounds humans cannot.
• This episode is the second of two episodes on "Stop, Look and Listen!" VHS.
• This is another episode where "No" was heard from "What Does Blue Want to Do on a Rainy Day?, Pretend Time" and "What Time Is It for Blue?".
• This is the only time Steve freezes when singing "We are Looking for Blue's Clues".
• In the Durate version, at the end of the Mail Time song, Duarte is on the right side instead of the left side.
• This is the second time of the line called "A Clue" from Blue's Sad Day.
• This episode is a reference to a question Dora and Boots ask during their Travel Song in the episode "Hic Boom Ohhh!" from Dora the Explorer.
• This episode is the only mailtime use with the line "Mail!" after cloud clue.
• During the So Long Song, Steve mainly said his lines instead of singing and there was no music, other than the background sounds.

Continuity

• The wind chime that Blue built from Art Appreciation appears in this episode.
• On the table there was Mr. Salt and Mrs. Pepper's water xylophone from What Does Blue Want to Do on a Rainy Day?.

Goofs

• During the first airing of this episode. When Steve was drawing the third clue, his hands and the notebook were in front of the wrong backdrop (the yellow and white checkered kitchen floor instead of the wooden floor when he and Blue were adding sounds to the silent movie). However, this was fixed in later airings. This also happens in Portuguese and UK versions
• When Steve and Blue go out the patio to see the rain, a Boom mic can be seen on top of the screen.
• In Pistas da Blue version, when Duarte yells GEEMO, he don't know which way did Blue sits. He went to the right.