Hey You What If?
Hey You What If? is a comedy program on CBBC. We answer the ‘what if’ questions that you never even thought to ask! Each episode asks a question and takes you on an unforgettable journey where the impossible is made possible to find the answer! The program has been available since 2024. A total of 39 episodes have been broadcast, most recently in January 2025.
Last episode
Hey You What If?
Things don’t quite go to plan when the moon turns into cheese.
Catching up on Hey You What If??
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Find out why stopping the Earth from spinning isn’t such a good idea.
Clouds might look like cotton wool, but if they really were, things would get very messy.
Good news - it’s possible to levitate! Bad news – there are some serious side effects.
Series 2
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'd expect.
Series 1
Experience the ultimate in long-distance travel - a holiday on Mars!
It really is possible to time travel into the future, and the team show you how!
Series 2
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.
Series 1
Find out why turning into a huge giant would be no fairy tale.
What would happen if there really was a lift that took you all the way up to space?
The deepest hole humankind ever dug only got one thousandth of the way through the earth. But what would happen if you kept digging?
Experience the most extraordinary ride in the universe – falling into a black hole.
Series 2
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!
Series 1
Empty the oceans and you’d see hidden wonders, but you’d also cause the end of the world.
Is it really possible to teleport? Spoiler alert: it could end in disaster!
Series 2
We reveal how to create the ultimate in tall buildings by going to the moon and taking inspiration from wedding cakes.
Series 1
It’s the ultimate baking challenge: making a gingerbread house you could actually live in.
Series 2
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.
Series 1
Why waking up with lizard powers would make you useless on earth but a superhero in space!
Series 2
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.