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Find out who won the London 2017 Mascot Competition and see their design take shape. Also, Radzi has the time of his life as he heads behind the scenes at one of the world's biggest sporting events, Wrestlemania!
Radzi and Lindsey take on a zip-wire challenge, testing the scientific principles of friction. Lindsey gets involved with some lambing, and singer-songwriter JP Cooper performs his single September Song.