Challenges, celebrities, makes and adventures with Barney, Lindsey and Radzi.
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Radzi puts his skates on and attempts to join the cast of Disney on Ice.
Lindsey hopes to pass her football referee test but she has limited knowledge of the game.
Lindsey Russell takes on the gruelling 26-mile course of the London Marathon.
Lindsey and Radzi go head to head in a white-water rafting time trial challenge.
It is Barney versus Lindsey in this high-speed challenge as they hit the go-karting track.
Radzi attempts to conquer the ultimate diving test - the 10-metre board.
Lindsey must perform a series of daring trapeze moves at a festival in Devon.
Radzi attempts to break the record for the most whoopee cushions sat on in 60 seconds.
Lindsey is at Chester Zoo to help with a pregnant okapi, a close relative of the giraffe.
Lindsey and Radzi go head to head in a bowling contest.
Barney and Radzi are at Goodwood race track to race goblins.
Lindsey takes on the World Championship canoe course.
Barney finds out about archeology at the Bedlam dig site in London.
Greg Foot joins Lindsey and Radzi in the studio and demonstrates the science of sound.
Barney and Radzi take on the challenge of electric bikes.
Barney goes to the Houses of Parliament to help put the clock back on Big Ben.
Radzi performs a floor routine at the World Championship Gymnastics in Glasgow.
Barney investigates the new craze of drone racing, and gets to have a go himself.
Radzi welcomes top expert Greg Foot onto Blue Peter to talk about the science of weather.
Radzi heads to an off-shore wind farm near Liverpool.