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  • CBBC

Hey You! What If...

  • 2020 – 2022
  • Returning Series
  • Kids · Comedy
  • ~5m / ep
  • 2 seasons

Comedy science series for children aged 6 and over made to blow your mind, one question at a time!

Latest: Season 2 · 2022

View all seasons
  1. E1. You Built a Mega Slide?

    Sep 5, 2022 · 5m

    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.

  2. E2. You Walked Through Walls?

    Sep 6, 2022 · 5m

    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.

  3. E3. We Got Rid of Bugs?

    Sep 7, 2022 · 5m

    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.

  4. E4. You Needed Two of You?

    Sep 8, 2022 · 5m

    From cloning to 3D printing, what if we could actually make copies of ourselves?

  5. E5. You Could Stop Global Warming?

    Sep 12, 2022 · 5m

    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.

  6. E6. You Lived on Venus?

    Sep 13, 2022 · 5m

    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.

+20 more episodes — open all seasons to browse every episode.

Hey You! What If... | Watch