First aired: December 5, 2018.
Moon Face:
- Written by: Joe Purdy
Mindy and Jet are led to believe that there is a face on the moon. Team Propulsion — and Mitchell — investigate what causes that 'face' to appear.
- Continuity Nod: Mindy thinking that the Man in the Moon is real is a nod to "More Than One Moon".
- Idiot Ball: Mindy believes that the moon has a face, despite having been there in previous episodes and clearly seeing no face. Even Mitchell gets in on the nonsense.
- Green-Eyed Monster: Face 9000 gets jealous when he thinks that the kids like the moon "face" better than him. They reassure him that he'll always be their number one face.
- It Kind of Looks Like a Face: Dr. Skelley teaches Sean and Sydney that you can see faces on everyday objects. They proceed to envision faces on the objects around them, such as a car, a jetpack, and a control panel.
- The Man in the Moon: Basically, the premise of the episode. Mindy thinks that the moon has a face, and the kids investigate to see what causes those splotches on the moon.
- Moon Rabbit: Sydney tells about how lots of people see different things on the moon. She briefly mentions the old Chinese legend of a moon rabbit.
- Oh, Crap!: Mitchell's reaction when Jet and Mindy see him by the treehouse.
- "Oh, Crap!" Smile: Mitchell's reaction when Sean and Sydney catch him snooping on them during the research montage.
- O.O.C. Is Serious Business: Everyone is surprised when Sean actually wants to go to space for once.
- Wink "Ding!": When the "face" on the moon winks at the end of the episode.
Lone Star 2 - Rocket Kids!:
It's Lone Star, and he's back for more.
- Written by: Craig Bartlett
Team Propulsion unearths pieces of an old rocket, inspiring them to create their own homemade foot rocket. Along the way, Sydney tells another Lone Star story, this time about how he built the first rocket.
- Continuity Nod: The characters reprise their roles from the original episode.
- Cowboy Episode: Just like the original "Lone Star" episode.
- Full Moon Silhouette: A silhouette of Lone Star is shown he first appears in this episode. Unlike most examples, however, Lone Star doesn't fly across the moon.
- Gigantic Moon: Used when Lone Star is introduced.
- Jerk with a Heart of Gold: Western!Sean becomes this towards the end of the episode, admitting to liking the "kooky feller" (Lone Star).
- Recycled Animation: Footage from the "Lone Star" episode is used during the ending song, albeit with brighter colors.
- Sequel Episode: To the season 1 episode, "Lone Star".
- Ship Tease: When Western!Jet asks Western!Sydney if she wants to hear an engineering song, she fans herself and says "My stars!"
- Took a Level in Kindness: In the original episode, the townspeople didn't approve of Lone Star's ideas and kicked him out of town. In this episode, they help him build the rocket and are much kinder and approving of his ideas.
- Wink "Ding!": When Lone Star winks.
