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E1 Tour of the Solar System/Jet Cooks Dinner
Celery teaches Jet, Sean, Sydney and Mindy about the planets in our solar system; Sydney, Mindy, Sunspot and Sean help Jet cook for his parents.
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E2 How We Found Your Sun/Treehouse Observatory
Jet explains how his family found Earth; the kids turn a treehouse into their own observatory to view the nighttime sky.
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E3 Round and Round/The Plant From Bortron 7
The kids learn how the planets orbit the sun and rotate on their own axes at the same time; Jet gets surprising results when he attempts to grow a plant from his home planet.
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E4 Just the Right Distance from the Sun/Solar Power Rover
The kids learn how Earth is the perfect distance from the sun; Jet, Sean and Sydney learn about solar power.
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E5 How Come the Moon Has Craters?/Backyard Moon Base
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E6 How Come the Moon Changes Shape?/Night of a Bazillion Stars
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E7 Earth Mission to Moon/Mindy's Moon Bounce House
The kids do a re-enactment of the first moon landing. Jet gives a gift to Mindy, which allows her to defy gravity.
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E8 Beep has the Blues/Chore Day
Beep is sad because her sister Boop is sick and can't move so the kids fly to Mars to figure out what is wrong; Jet and Sean help Sydney turn her chores into fun science games.
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E9 A Kid's Guide to Mars/Jet 2
The kids join Celery and Carrot on a trip to Mars; and Jet builds a robot version of himself so that he can be in two places at once.
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E10 More Than One Moon/Visit to Mom's Office
Mindy finds out there is more than one moon in the solar system; Sean and Sydney take Jet to meet Sean's mom at the Deep Space Array.
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E11 Mission to Mars/Sound Abound
Jet and Sydney go away on a mission to Mars; Sean is surrounded by noise while trying to complete his science project.
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E12 What's Up With Saturn's Rings?/Sunspot's Night Out
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E13 The Grandest Canyon/A Visit to the Planetarium
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E14 A Visit From Uncle Zucchini/Mindy's Weather Report
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E15 Ice Moon Enceladus/What Goes Up...
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E16 Solar System Bake-Off!/Kid-Kart Derby
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E17 Asteroids, Meteors, and Meteorites/Mindy's Meteorite Stand
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E18 Comet Fever/Asteroid Patrol
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E19 Mindy Pet-sits/Treehouse Space Station
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E20 Date Night/Face on the Fritz
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E21 So Many Moons/Project Pluto
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E22 Sunspot and the Great Red Spot/Uncle Zucchini Babysits
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E23 Diggin' Earth/Mindy's Mistery
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E24 Which Moon is Best?/Detective Mindy
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E25 Tiny Blue Dot/Earth Camping
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E26 What's a Satellite/Satellite Selfie
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E27 Space Junk/Scientific Sean
The kids meet up with Uncle Zucchini and start to clean up their space neighborhood; Jet, Sydney, and Sean build paper airplanes.
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E28 Beep and Boop's Game/Constellation Prize
The kids help get Boop over a ravine on Mars, and learn that satellites help scientists communicate with far away rovers; the kids learn about constellations.
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E29 Sunday Drive
The Propulsions try out a new dashboard operating system, which only serves to confuse them as their test drive to Mars goes horribly wrong.
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E30 Total Eclipse of the Sunspot/Sean's Year in Space
Sunspot acts strange when Mindy, Jet, Sean and Sydney use a solar panel to try to improve energy efficiency; Sean is excited about NASA's Year in Space program.
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E31 Jet's First Halloween
Sydney, Sean and Mindy plan fun things for Jet's first Halloween, including carving jack-o'-lanterns, dressing up in costumes and going trick-or-treating; Carrot and Celery turn their garage into a haunted house.
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E32 Whole Lotta Shakin/My Fair Jet
Sunspot and the kids attempt to build the tallest tower on the moon; Sean and Sydney want to take Jet to the DSA Open House.
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E33 From Pluto With Love/A Star is Born
The kids make their own Valentine's; Sydney directs everyone in a backyard movie.
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E34 The Mindysphere/Lone Star
Mindy explores her special zone with her friends; a dig uncovers a special item linked to the wild west past.
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E35 Space Race/Jet's Time Machine
Celery competes against her brother, Uncle Zucchini, in a race; Jet tests his first experimental time machine.
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E36 Sean's Neptune Tune/Earth Day Birthday
Jet proposes a song to calm Sean's nervousness about flying; the kids plan a surprise party for Jet.
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E37 Castaway Carrot/Jet Can't Sleep
Celery, Jet and Sunspot accidentally leave Carrot on the moon. / A loud thunderstorm jolts everyone awake.
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E38 Holidays in Boxwood Terrace
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E39 Not a Sound/Mindy in Space
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E40 A Hammer and a Feather/Commander Mom