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These are the episodes of Numberstairs.

Episodes!

Season 1: Welcome to Numbertown!, We're Doing Everything, Stephen's Lemonade Stand, Add and Subtract, Numberstairs vs. Numberfanagram, Rectangle Rays, Dollars, Trinitrotoluene's Rubik's Cube, Numberstairs Cafe, The Winner, A Medium-Sized Mathematical Land, The Numbertown Zoo, Numberstairs and Numberlemon, Duck!, Triangles Make Squares, What's the Point?, Multiplication Machine, The Rocket, Meet the Infi-car, Circle, Circle, Goldielocks and the Three Bears, The Remainder Drainer, Exponent Ray, The Numbertown Amusement Park, International Night, Dark Magic B is Dark Magic B

Season 2: The Square Rootinio of Italia, Infinio's Garden, Don't Call her Cutie Pie, Voting Day, Again?!, Pythagorsquaroot's Theorem, Cool Numbers!, Quack on Track, Up in the Clouds, I'm the Cool Guy, The Numbertown School, Crazy Shapes!, Roman Numerals, The 40th Episode Counting Special, What's the Product?, Long Division, Break into Primes!, The Quadrilaterals, Step Squads, Magic Mirror, A New Leader Has Come, Super Rectangles!, Lucky Squares!, The Annual Music Contest, Alien Invasion, A Wonderful Card Game

Previews for BFNS: Something Important Tomorrow..., Picking Some Teams Part 1, Picking Some Teams Part 2, More Teams Coming! Part 1, More Teams Coming! Part 2, We Are Practicing

Battle for Number[stairs/town] episodes: One Story equals Fun, Two Parts of Every Story, Three Sides a Treat, Four-Sided Shapes, Five Shooting Stars, Six-Sided Squares, Seven Colours, Eight Things, Nine Lives, Ten Pens

Season 3: At the Beach, Cuboid Attack, Infinio's Hiccups, The Hundred Chart, Counters Part 1, Counters Part 2, Prime Time, What's a Phone?, Exploring Number Bases, More Number Bases, Fraction Action, Possible Combinations, Add the Next, Just Add Pie, Telling Time, Qurrybusters, Infinio's Advertisement, Party's Party, Iguansquare, Ungumbal Slumbal Eyeball Meatball, Josh's Discovery, Infinio's Cake, 75th Episode Special, Danger at Party's House, Lucky Chance, Tall Steps

Season 4: Gold Rush, Glitch Day, Iguansquare's Not-So-Amazing Array Display, Counting in Different Languages, What is a Formula?, Ray Track, 85 Mathematics Street, Equal Faces, Under the Cherry, A Surprise, My Name's Toxy, The Medium Dorito, (Un)lucky Number Ninety-One, Party Goes to Slaughter, Pi Times Upon a Time, Now We Are Eta to Psi, Sokk'rPi On Our Side, Tall Towers, Radicalland, New Pi's on the Block, Numberstai'umans, 100th Episode Special, Pisquare vs. Pirty, Orbs, Emily's Bar Graph, Meet Theodore!

Season 5: Quest to find her Discovery, Different Denominators, Subtraction Fraction, Getting Ready for Tau Day, The Mystery, MDZ's Feast, My Name's Toxy, Numberpets, Half of Pi, We Must Prepare, The Secret Path, Uncool!, One Thousand! Two Tens! Four Ones!, Prime Lime, Arrangements Away!, 120th Episode Special, Square Club, This Pen, The Big 1.23, Uh Oh!, Blocking Cubes, The Numbertree, Get Ready!, Ninjablock 101, Doubled Blocks, Nineteen Tens

Season 6: I am Fifty-One, I Pint Seventeen, Zeronimo, Survival or Not?, You Can Always Be Bigger, Nwotrebmun ot emoclew!, Five Tens and Six, Both Together, A Numberride, Fake Truths, Numberstairs Rally, Rectangle Alley, Numbertown Annual Football Match, Many of the Squares You've Not Noticed Before, A Book of Five Chapters, Ogguare's Minute of Fame, Prime Squads, What's 81x10?. Eeeeeeeeeeeeeee..., 150th Episode Special, Buying New Fangs, Meet TacoCat!, Prime Palace's Opening, Rectangle Club, The Delay, Emily's Bad Day

Battle for Number[stairs/town] Again episodes: Eleven in Heaven, Tick, Tock, Twelve on the Clock, Unlucky Number Thirteen, Numbertown Skate Park, The Talking Staircase, A Wonderful Party, Numbertown's First Art Gallery, Eighteen Finally Straighteen, Crazy Shape Day, Two Tens' Ending

Season 7: Now We Are Soser to Chamy, Questionable Day, The Play, Land of the Giants, Infinio's Dream, Planet True, It's Today!, Cubes, Muffin Mess, What Has Happened?, Must Get Ready, AlFloPenn's Fair, Worst Day Ever, Night, Night!, AlFloPenn Day, Super Rectangle, Cursed Image, Square-Square, Five Not Dive, Diamond Dig, Over the Rainbow, Stairs or Chairs?, Prime Rhyme, Angles, Numberbots, Cheeseland

TATNK episodes: Addition Mission, Regroup Soup, Subtraction Action, Borrow Before Tomorrow, Multiplication Nation, Double-Digit Multidays, Divi-Drive, DDDDIIIIVVVVIIIISSSSIIIIOOOONNNN, Times Itself, Thick Blocks, Radicalizer, This Cubed makes a Whole Number

Season 8: Infinio's Park, Ray Riding, Rockets and Blockets, The Potato Farm, Numbertown's Birthday, Haystacks and Haystacks, Spiral Ride, CherryTree's Plan, Ready or Not, here I Come!, Cool Music, Flipppin' Days, Yeah!, Ohoooooo, Square Fair, One, two, two, fifty., Rainbowland, I'm Number Fifty-Two, Fifty-Three, Look at Me, The Party War, At the Sunset, Ye, Good Times, Our Success, In the Mix, Out of Heaven, News [S/s]o Great

Number Patrol episodes: Quest to Figure Out 59, Amigo [J/j]oins Number Patrol, Snowplow Day, At the Rocky Mountain, Numbers Save Infinio, Trick Quizzes Ahead, Baaaaaa..., Yay Today

Season 9: Squaland, Super Rectangle in the Mix, Someone New, The Pizza Building, Funfair of Coins, It's a New Day, Don't Ask What's it's About, The Cube Episode, The Whole of Me, What's This?, Thanks for 6 months!, Beyond Ten, Pie's Dream, Ouch!, Straight Lines, Sour Trials, Mak's Cheese, This Episode is About Noni, Bad Surprise, Numberstairs Express, Infinio's Last Day, Just a Joke. War Arrives, The Battle of Iaxotae, Terrifying Sights, At an End

Terra and Cotta episodes: Terra's Figurine, Best Painting of All Time, Worst Day, Perfect Picnic, On an Airplane, Twarkl-Cotta, Numberstairs the Movie II

Season 10: Welcome Back, Dance Party, Ungumbaaaaaaaaaaaaaal, Tween Scenes, Emily Gets Scrapped, The Breaking News, Infinio and Emily, Infinio's Questions, We're Number #1, Emily Goes to Jail, Meet Isaac, Negative Square Roots, Emily [G/g]ets Out, One Trillion, The G Skyscraper, Yoyoyaya, Geglio Day, Addition Shark, Growing on the Hill, On The Ship, Meet Alice!, The New Newsstand, Meow Meow!

The Power of True episodes: An Unexpected Day, Rough Riders, Busky Tusky Escalator, The Cars, Playful Park, The Airplane Trip, Exploring the City, At the Farm, Around the Hill, Hooray for Crazy Shapes

Movies: Numberstairs the Movie, Numberstairs the Movie II