Hey You What If?
(2020)Streaming Episode Guide
Season 2
You Could Walk Up Walls?
Episode 26 - 10-11-2022
We take inspiration from the natural world as we imagine a new kind of superhero that can walk up walls.
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Earth Ran Out of Energy?
Episode 25 - 10-10-2022
We try out a crazy idea from science fiction to build a giant sphere around the sun and give us more energy than we'll ever need.
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You Surfed Without Water?
Episode 24 - 10-07-2022
Sometimes you want to go surfing, but it's too far to the beach, so we try surfing on land with the help of a volcano and some giant fans.
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You Were Indestructible?
Episode 23 - 10-06-2022
We imagine becoming unbreakable by removing our bones, turning our skin to metal and finally by becoming completely elastic, but indestructibility isn't everything we hoped for.
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You Had Kangaroo Legs?
Episode 22 - 10-05-2022
To win a marathon, are you better off with the bouncing legs of a kangaroo, the long legs of a T. rex or sticking with the legs of a human?
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You Built the Tallest Building on Earth?
Episode 21 - 10-04-2022
We reveal how to create the ultimate in tall buildings by going to the moon and taking inspiration from wedding cakes.
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You Threw a Ball Round the World?
Episode 20 - 10-03-2022
To throw a ball around the world, you need to start out in space, throw it ten times the speed of a bullet and make sure your ball does not explode when it hits the atmosphere.
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You Only Ate Burgers?
Episode 19 - 9-30-2022
If everyone in the world ate nothing but cheeseburgers, we would run out of land, and even if we went meat-free, we would have to invent some crazy burgers to get the nutrients we need.
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There Were No Colours?
Episode 18 - 9-29-2022
Imagine removing all the colours one by one? It would change more than just how things look, and after taking out just three colours, we would not be able to see anything at all.
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You Flew Like a Superhero?
Episode 17 - 9-28-2022
Flying like a superhero may sound like enormous fun, but there are some serious downsides that Hollywood does not tell you about - weather, extreme cold and even fizzy blood.
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Money Grew on Trees?
Episode 16 - 9-27-2022
If you had a tree that could grow money, would that make you rich? Even if you wait 20 years for your tree to grow, you will probably end up no richer than you started.
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You Shrunk the Earth?
Episode 15 - 9-26-2022
We find out what would happen if you shrank the earth. You could jump higher and move faster, but you would end up with altitude sickness even at sea level.
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You Built a Giant Sand Castle?
Episode 14 - 9-23-2022
Is it possible to build a sand castle the size of a real castle? We imagine how it could be done, using a pneumatic drill and a huge, solid gold steamroller.
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You Were the Last Person on Earth?
Episode 13 - 9-22-2022
What would the planet be like if all other humans disappeared, leaving you as the last person on earth?
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You Walked on the Ceiling?
Episode 12 - 9-21-2022
We try using a gravity-bending black hole and spinning the earth faster to see if we can make it possible to walk on the ceiling.
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Animals Were Supersized?
Episode 11 - 9-20-2022
We look at whether some animals can get gigantic and find out that if you are being chased by a giant snail or a humungous butterfly, then fear not, you must be dreaming.
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Your Mind Could Move Things?
Episode 10 - 9-19-2022
We imagine a world where it's possible to move things with your mind like films, but find that the laws of physics mean that this superpower wouldn't quite work like you expect.
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We Had Two Suns?
Episode 9 - 9-16-2022
There is a way that Earth could have a second sun, so we try it out to see what happens.
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You Were Invisible?
Episode 8 - 9-15-2022
We try out three potential ways to become invisible and discover some surprising side effects.
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You Could Shout Round the World?
Episode 7 - 9-14-2022
Find out how to shout from one side of the world to the other.
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You Lived on Venus?
Episode 6 - 9-13-2022
Venus has acid rain, crushing pressure and is hotter than an oven, so it might not sound like the ideal place to live. However, up in the clouds it's almost just like home.
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You Could Stop Global Warming?
Episode 5 - 9-12-2022
Imagine if we had a thermostat that could turn the world temperature down - could we fix global warming? But be careful, a few degrees too far and could cause an ice age.
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You Needed Two of You?
Episode 4 - 9-08-2022
From cloning to 3D printing, what if we could actually make copies of ourselves?
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We Got Rid of Bugs?
Episode 3 - 9-07-2022
Bugs might be annoying, but we would soon regret it if we got rid of them - all our favourite foods would disappear, and there would be dung everywhere.
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You Walked Through Walls?
Episode 2 - 9-06-2022
Wouldn't it be cool to be able to walk through walls? From turning into a gas to quantum trickery, we discover why it wouldn't be quite as useful as you'd like.
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You Built a Mega Slide?
Episode 1 - 9-05-2022
Could you build a slide to the other side of the world? You would need to start in space, use the slippiest slide ever and make sure you have enough supplies before you go down it.
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Season 1
You Could Fly Like a Bird?
Episode 26 - 5-11-2020
Anyone can fly like a bird – you just have to travel across the solar system to do it!
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You Could Switch Off the Sun?
Episode 25 - 5-08-2020
See what would happen if you really could switch off the sun.
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You Took All the Water Out of the Sea?
Episode 24 - 5-07-2020
Empty the oceans and you’d see hidden wonders, but you’d also cause the end of the world.
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You Could Teleport?
Episode 23 - 5-06-2020
Is it really possible to teleport? Spoiler alert: it could end in disaster!
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You Could Build a Gingerbread House?
Episode 22 - 5-05-2020
It’s the ultimate baking challenge: making a gingerbread house you could actually live in.
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You Woke Up as a Lizard Superhero?
Episode 21 - 5-04-2020
Why waking up with lizard powers would make you useless on earth but a superhero in space!
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You Try to Catch a Falling Star?
Episode 20 - 3-27-2020
What happens if you try to catch a falling star? Spoiler alert - probably best not to try!
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You Could Run at the Speed of Sound?
Episode 19 - 3-26-2020
A fun run goes wrong when one ambitious runner tries running at the speed of sound.
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The Earth Was Shaped Like a Doughnut?
Episode 18 - 3-25-2020
Would it be possible to live on an Earth shaped like a doughnut? You might be surprised!
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You Could Live in Slow Motion?
Episode 17 - 3-24-2020
Find out why living in slow motion would let you see things no-one else can!
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You Could Actually Reach for the Stars?
Episode 16 - 3-23-2020
Want to reach for the stars? It would be the journey of a lifetime - literally.
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Everything You Touched Turned to Gold?
Episode 15 - 3-20-2020
What if you could turn things to gold? This episode shows that it might not work out that well.
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You Could Live on the Moon?
Episode 14 - 3-19-2020
Some day people will live on the moon – find out just what they are in for.
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You Could Shrink Yourself?
Episode 13 - 3-18-2020
If you have always wanted to shrink yourself, this is the episode for you!
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You Can't Wait for Christmas?
Episode 12 - 3-17-2020
It really is possible to time travel into the future, and the team show you how!
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We Could Actually Stop Climate Change?
Episode 11 - 3-16-2020
The planet is being destroyed - but this episode demonstrates the things you can do to help save it.
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The Earth Was Flat?
Episode 10 - 3-13-2020
Find out why a flat Earth would feel very unflat indeed!
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The Moon Was Made of Cheese?
Episode 9 - 3-12-2020
Things don’t quite go to plan when the moon turns into cheese.
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The Earth Stopped Spinning?
Episode 8 - 3-11-2020
Find out why stopping the Earth from spinning isn’t such a good idea.
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Clouds Were Made Out of Cotton Wool?
Episode 7 - 3-10-2020
Clouds might look like cotton wool, but if they were, things would get very messy.
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You Could Levitate?
Episode 6 - 3-09-2020
Good news - it’s possible to levitate! Bad news – there are some serious side effects.
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You Could Go on Holiday to Mars?
Episode 5 - 3-06-2020
Experience the ultimate in long-distance travel - a holiday on Mars!
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You Could Turn into a Giant?
Episode 4 - 3-05-2020
Find out why turning into a huge giant would be no fairy tale.
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You Could Take a Lift to Space?
Episode 3 - 3-04-2020
What would happen if there really was a lift that took you all the way up to space?
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You Could Dig Through the Earth?
Episode 2 - 3-03-2020
The deepest hole humankind ever dug only got one thousandth of the way through the earth. But what would happen if you kept digging?
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You Fell Into a Black Hole?
Episode 1 - 3-02-2020
Experience the most extraordinary ride in the universe – falling into a black hole.
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