100th Episode Celebration is the seventh episode of Blue's Clues from season 5 to be marked as the special. This means the series reached 100 episodes as the previous episode was the 100th episode to air.
Sidetable's face disappears onscreen for this episode.
Joe hopes the show would go on for 1,000 episodes, but it never happened, since the series was ended in 2006 with a grand total of 142 episodes.
At the end of the party, the closing credits music from the Season Three long episode Blue's Big Musical can be heard briefly.
Scenes of upcoming episodes of this season are seen here in throwbacks.
The instrumental tune for What Time is it for Blue's version of The So Long Song should've been included on the closing credits.
In "The Clues We've Found" throwback, a clip from the previous season finale episode "Steve Goes to College" shows Joe holding up the cassette tape that makes a ringing sound (Replaced with a bike horn honking sound,) and the pawprint was on the sound waves.
When the kids cheers and applause sound effect was heard at the beginning, captions said "(crowd applausing)".
When Periwinkle said "They're here," captions said "They's here" twice, but he said it once.
In "The Things We've Learned" throwback, the instrumental version of "We Can Be Anything That We Wanna Be" from the Season Three long episode Blue's Big Musical was heard.
In "The Places We've Been" throwback, the instrumental version of the Glasses song from the Season Three finale episode Magenta Gets Glasses was heard.
In "The Clues We've Found" throwback, the instrumental version of "Things I Love to Do" from the audio version of the Season Three episode Blue's Big Treasure Hunt was heard.
This special was included in the special features on the "Get to Know Joe!" DVD.
On that release, the Nickelodeon logo (With 2002 Blue's Clues copyright info) was added after the Nick Jr. Productions logo.
This also occurs at the end of "The Big Book About Us," also on that DVD.
Blue's Surprise at Two O'Clock! (Season Two) - Steve relaxing and then the viewer alerting Steve that a minute is up as Mailbox comes in to give Steve his letter (or if you remember at the end, his second clue)
The Things We've Learned
Let's Boogie - Steve with Blue and Choreographer telling the viewer that he'll need their help
Signs - Steve asking the viewer if they'd help with the sign language story
The Snack Chart (This Season) - Joe making sure the viewer will help him with the Pigs and Potatoes Chart
Anatomy - Sarah Scientist asking Steve if he sees anything as she turns on
The Snack Chart (This Season) - Joe saying that we made everyone's favorite snack just by using the chart
Anatomy - Steve asking what part of Sarah Scientist's body that is
Thankful - Steve agreeing to the viewer when they say "In thirds" then explains that it gives three equal pieces for three felt friends
Anatomy - The viewer answering the question from the previous clip from the episode throwback, then Steve telling Sarah Scientist that her heart is pumping blood all through her body, then Sarah Scientist pointing out that's what the heart does and Steve remembering from the beginning of that episode
Playing Store - Joe asking the viewer which frame will Joe's picture fit perfectly inside
¡Un Día Con Plum! - Cabessa, Piernas, Pies, Steve saying its kind of like a song and telling the viewer to do the action song with him
Blue's Big Musical (Season Three) - Steve sings "At The Show" and it cuts to the next clip before Steve can sing "show"
Blue's Big Musical (Season Three) - Sidetable sings after Periwinkle lifts off the cloth from her. The first "I just want to" and last "In the show" are not put in to the throwback montage
Environments - Steve, Blue and Mother Nature singing the rainforest part with "The Rainforest is hot, but it's a really wet spot" cut out
Colors Everywhere! (Season Five) - During "The Colors Song," Joe shows the viewers that mix blue and yellow, and they're suddenly green, then blue and green make aquamarine.
Blue's Big Costume Party (Season Three) - Costume limbo for Blue and Magenta's turn, They go to the next clip before Steve can sing "How Low can you go?"
The Alphabet Train (Upcoming Season Five episode) - Joe sings the chorus a 2nd time during "I'll Never Forget My Alphabet" between "H" and "I" (goof note: in the episode, Joe was completely shown crouched down and the "D" car with the drum was off of the screen; but in this episode, Joe is shown from the torso upstanding and the "D" car is still visible)
Signs and Patience - Steve and Joe sing the Mailtime Song. (In both episodes, Blue's singing sound effect from Blue's Favorite Song was used; but in this episode, Blue's high singing sound effect was used.)
Body Language: Mailbox wasn't shown in this scene.
A Brand New Game: Joe isn't in the felt board while pretending to be a bouncing cow looking through a telescope. Also Blue and a Felt Friend weren't shown in this scene.
I'm So Happy: Blue wasn't shown when Joe says saying that the viewer was being so smart that makes him happy.
Dress Up Day: Joe isn't in the living room when he tells the viewers to watch this while holding all the clothes.
Colors Everywhere: Joe isn't in the living room when he says, "Orange you glad I changed my shirt?"
Dress Up Day: Joe is in the plant book from "Let's Plant" instead of the living room while pretending to be a explorer.
"A Brand New Game": Joe is in front of the 3 houses in the storybook from "Blue's Predictions" instead of the living room when he says, "Presto Change-Joe!".
Numbers Everywhere!: Numbers 0, 1 and 2 were already pasted on three boxes where the stuffed dolls were in when Joe passes them. Also a paw print wasn't seen on the number 0 representing the 1st clue (0 is also the 3rd clue).
Blue's Big Band: Joe isn't in the living room while he's playing the cow bell.
"A Brand New Game": Joe isn't in the living room when he shows the viewers a silly hat during the Presto Change-Joe Game.
Bedtime Business: Blue, Slippery Soap and the Bubble Singers weren't shown in this scene.
Dress Up Day: Robot Joe is in the game show room from "Look Carefully..." instead of the living room when he says, "Greetings, I am Robot Joe."
Joe's Surprise Party: Joe isn't in the living room while he dances and sings "Happy Birthday to Me". Also Blue wasn't shown in this scene.