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Daredevil scientist Greg Foot and Lindsey do the talking so it's down to Barney and Radzi to take on the Chilli Challenge.
Quiz: How internet savvy are you?
Hacker Time - The Next Step... But One
If you could time-travel where would you go?
We’ll hide these CBeebies shows for 30 Days.
Bring them back!
Why did you hide them?