Linda tells Lawrence that Candace got her imagination from him, but he's only the biological father of Ferb.
When they said Phineas spelled tie machine instead of time machine, he actually spelled time machine right.
This is the first clip episode in the series, as since during The Moments We Didn't Get Along, clips from "Rollercoaster", "Lawn Gnome Beach Party of Terror!", "Flop Starz", "The Fast and the Phineas", "Lights, Candace, Action!", and "Candace Loses Her Head" were shown.
Goof: When Dr. Doofenshmirtz and Perry attend the Dr. Feelbettershow, Perry appears without his hat. Despite this, Doofenshmirtz recognizes him as he nemesis "Perry the Platypus" even though in countless other episodes (as early as "Lawn Gnome Beach Party of Terror!") he has trouble recognizing him as anything other than a regular platypus if Perry is not wearing his hat. Perry has even used this fact to his advantage several times and it has even been used as a specific plot point in some episodes as well as the movie.
When Phineas tests the first circuit, the part that Candace was holding returned to the floor, but every other time it stayed in the hands of whoever possessed it.
When Dr. Doofensmirtz locked all of the secret agents to there seats one secret agent is not locked up.
Musical Song(s): My Nemesis, and The Moments When We Didn't Get Along
When a voice was heard over the speaker before Phineas, Ferb, Candace and The Fireside Girls arrived, saying "The museum will be closing in ten minu....." but was interrupted by their arrival.
The musical number The Moments When We Didn't Get Along was cut one verse short in order to save time.
Security Guard: Aren't you boys a little young to be working in a museum?
Phineas: Yes, yes we are.
Security Guard: Well it's nice to see young people taking an interest in history.
Kid: You got tossed out too, huh?
Candace: Yeah, for yelling.
Kid: You yelled in a museum? That is hardcore.
Candace: Why'd you get tossed out?
Kid: Stole a pterodactyl. It's not like I yelled.
Phineas:(his pupils expand) Gadgets through the ages. This exhibit was made for us, Ferb.
Doofenshmirtz:(about the Freezenator) Oh, that? That's a Freezenator ray, but, I don't want to explain it again, I just gave the whole spiel to Peter, but don't worry, he's stopping me, he's got it well in hand.
Phineas:(looking at the skeleton of Bucky) Didn't we have a dog named Bucky who got sick and went to live on kindly old man Simmons' farm?
Dad: Uh, let's move on, shall we? This next exhibit is kindly old man Simmons. Hey, who's up for milkshakes?
Candace: You built a time machine that has to be PLUGGED IN?!
Doofenshmirtz: (about Peter the Panda being his new nemesis) It's not that I still don't hate you, Perry the Platypus. I do. But I just think we should fight other people.
Isabella: Hey Phineas.
Phineas: Hey Isabella.
Isabella: Whatcha doing?
Phineas: We're fixing this time machine.
Isabella: Isn't that impossible?
Phineas: That's a possibility.
Phineas: Candace, what are you doing?
Candace: Running for my life, what does it look like?!
This episode aired February 29, 2008 on Disney Channel Latin America
The power to bring the time machine back from prehistoric times is a bolt of lightning, just like the DeLorean from Back to the Future.
The shot of the Tyranosaurus Rex in the rain is a copy from "The Rites of Spring" sequence in the Disney movie Fantasia.
The use of turtle shells as helmets is a reference to The Flintstones.
The episode shares a name with the Jonas Brothers first CD, which is also entitled "It's About Time"
The band that plays during the "Nemesis" song is modeled after a real band called "The Lovin' Spoonful".
After she is struck by lightning, Candace's hair resembles that of the Bride of Frankenstein.
When Phineas, Ferb, and Candace end up in the Jurassic era, music similar to the theme from Jurassic Park can be heard.
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