Double Back

Episode

Gallery

Transcript

End of my tether, don't say that word! Areas of this article contain spoilers about Double Back. Please proceed with caution. Read at your own risk.

Season	Specials
Episode	2
Air Date	29 August 2021, 09:40 (UK time)
Level	Blue Level Five
Learning Competency	Factors of 64, doubling
Writer	Max Allen; Ciaran Murtagh & Andrew Jones (Head Writers)
Director	Simon Taylor
Episode guide
Previous	The Treasure of Hexagon Island
Next	About Time (Numberblocks) Band Together (Learningblocks)

Double Back is the second special episode of Learningblocks. This is the 122nd Numberblocks episode overall.

Synopsis

It's time for a time travel adventure! Sixty-Four's new time machine keeps sending the Numberblocks back in time. Can they double up in time to fix it?

Characters

• Two (smallest number)
• Three
• Four
• Eight
• Nine
• Ten
• Thirteen
• Fourteen
• Sixteen
• Twenty-Five
• Thirty-Two
• Sixty-Four

Trivia

• This episode's description used to show that it's a crossover with Alphablocks, but it was later removed.
  • This tweet from the Numberblocks Twitter gave the impression at the time that this was a mistake, and that there wasn't going to be any crossover special, at least not in the near future. However, crossover specials between Alphablocks and Numberblocks have come out since then.
• This episode was put on iPlayer on Friday, two days before it aired on TV.
• This episode's logo is a parody of the movie "Back to the Future".
  • Sixty-Four's time machine is a parody of the DeLorean car.
• This episode has a time-travel plot, where a certain character travels back in time to change an event in the past.
  • The type of time-travel featured in the episode is a "time loop", where the main character gets sent back 2 minutes in the past, in an altered timeline, with the only difference being that the main Numberblock is twice their size. This repeats until Sixty-Four is the one heading to Sixty-Four's time machine, to plug the time regulator.
  • There are a total of six different timelines in the episode.
• This is the third episode to teach about doubling and halving. First being Double Trouble and second being Snow Day Doubles.
• This episode marks the debut of the square root sign and the decimal point.
• Sixty-Four is the biggest Numberblock in this episode, and is the biggest Numberblock to appear in any of the specials.
• The episode uses dynamic physics in some parts such as when Ten and Three fall into the ball pit and some of the balls roll out.
• Despite being a special, people still refer to it as the 122nd episode of Numberblocks.
• The shoe shop from Two Times Shoe Shop, and Octonaughty's lair from Now in 3D have cameo appearances in this episode.
• In this episode, Three still has the rubber duck from The Lair of Shares.

Video

Numberblocks episodes

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Series 1	High Five!	One, Another One, Two, Three, One, Two, Three!, Four, Five, Three Little Pigs, Off We Go, How to Count, Stampolines, The Whole of Me, The Terrible Twos, Holes, Hide and Seek
Series 2	Ten out of Ten	Six, Seven, Eight, Nine, Ten, Just Add One, Blast Off, Counting Sheep, Double Trouble, The Three Threes, Odds and Evens, Fluffies, The Two Tree, Numberblock Castle, Ten Green Bottles
Series 3	Number Fun	Once Upon A Time, Blockzilla, The Numberblocks Express, Fruit Salad, Zero, Now We Are Six to Ten, Numberblobs, Building Blocks, Peekaboo!, Hiccups, What's the Difference?, Numberblock Rally, Five and Friends, Octoblock to the Rescue!, Ten Again
	Fifteen and Friends	Flatland, Pattern Palace, The Legend of Big Tum, Mirror, Mirror, The Wrong Number, Eleven, Twelve, The Way of the Rectangle, Ride the Rays, Block Star, Thirteen, Fourteen, Fifteen, Tween Scenes, Step Squads
Series 4	Season 5	Fifteen's Minute of Fame, On Your Head, Ten's Place, Balancing Bridge, Sixteen, Square Club, Seventeen, Eighteen, Loop the Loop, Nineteen, Twenty, Tall Stories, Flights of Fancy, I Can Count to Twenty, Heist
	Season 6	Sign of the Times, Fun Times Fair, The Lair of Shares, Terrible Twosday, Divide and Drive, Twenty-One and On, We're Going on a Square Hunt, Thirty's Big Top, Land of the Giants, Fifty, Sixty's High Score, The Big One, One Hundred, One Thousand and One, More To Explore
Series 5	Season 7	Your Turn, Now You See Us, Ten's Top Ten, What's My Number?, Fun Times One Times Table, The Many Friends of Twenty, Ten Vaulting, Twoland, Two Times Shoe Shop, Odd Side Story, How Rectangly!, Rectangle Racers, The Team Factor, Hidden Talents, Making Patterns
	Season 8	Now in 3D, Club Picnic, Too Many Threes, Circus of Threes, Figure It Out, Snow Day Doubles, Steps Versus Squares, Puzzle Square, Four on the Floor, Sky High Fives, One Giant Step Squad, Square on the Moon, Heroes With Zeroes, What If?, 100 Ways to Leave the Planet
Specials		The Treasure of Hexagon Island, Double Back, About Time, The Twelve Days of Christmas, Making Friends, Crossover, The Case of the Missing Blocks, The Blocks v Blocks Games
Other Stuff		Numberblocks Theme Song, Fourth Wall Breaks

Learningblocks Specials

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Other Stuff
Numberblocks Theme Song, Alphablocks Theme Song, Stealth Words, Fourth Wall Breaks