The writers of both stories are new to the series, however, Gentry Menzel has previously written for Postcards from Buster.
Francine reads the title card for the first story. It's the one where D.W. appears as a superhero and says "tada!" Binky reads the title card for the second. It's the one where Buster searches around the title card and then looks inside it, making his face look big.
In what is likely another tribute to the tenth season, both D.W. and Nadine's spacesuits bear the number 10.
Real-Kids Segment: A group of kids learn about the different planets in the solar system, including the recently discovered 10th planet, and then they create their own imaginary planets.
Arthur: Thank you all for coming.
D.W.: What are you talking about? I'm here all the time.
Mrs. Read: D.W., quiet. Your brother is solving a mystery.
Fern: Holmes says that there is nothing more stimulating than a case where everything goes against you.
Arthur: Ms. Perske doesn't believe me, my own Dad doesn't believe me, even I'm starting not to believe me.
Fern: As Holmes once said, "the world is full of obvious things which nobody by chance ever observes." Your best bet is to go back to the scene of the crime and examine the evidence.
D.W.: Do you wanna hear about the real Mars, or just the made-up story?
Mr. Read: Here's a picture of the real Mars.
D.W.: It looks like a big, rusty desert. How can anything live there?
Arthur: Martian blood?
D.W.: From the big lizards. Who are as tall as skyscrapers. And and...
Arthur: And never sleep, right? But they have to eat eat all the time and sometimes they attack each other.
D.W.: Right. How come everyone knows about this but me?
Arthur: D.W., that's from a silly movie called Attack of the Sleepless Martian Dinosaurs. Buster made me watch it.
D.W.: Tibbles! I should have known better.
Tommy: And do you know why Mars is called the red planet?
Timmy: Because Martian blood flows red in the dark.
Nadine: Do you think anybody lives on Mars?
D.W.: I dunno. But if someone is here, they should be throwing us a parade. It's not every day that someone from Earth comes to visit them.
D.W.: Juice. Cookies. What else should I bring? Oh yeah! A co-pilot!
Nadine: Where to, Captain?
Nadine: Oh goody. Are we spending the night? I didn't bring my toothbrush.
D.W.: Nah, this is just a test mission to see what it might be like. I won't really be going till I'm a little older.
Emily: How about you, D.W.? What are you going to be?
D.W.: Can I ask my question now?
Arthur: What, D.W.?! What's so important that you have to interrupt me?
D.W.: When's the show gonna start? You've been talking forever.
Dave Read (Arthur's father) was born in either 1961 or 1960. He stated he was Arthur's age (8 years old) when Neil Armstrong walked on the moon. He would be 35 years old, if the series takes place over a year. Otherwise he would be 45 years old.