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1. Bölüm Former Taoiseach Leo Varadkar and singer Lyra team up as Special Forces veteran Ray Goggins pushes them to their limits through the wild mountains of Drakensberg, South Africa.
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2. Bölüm Rap trio Kneecap join Ray in the far north for a five-day Arctic experience that will test their resilience in a deadly landscape where temperatures can drop below minus 40
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3. Bölüm Paralympian Ellen Keane and camogie star Ashling Thompson travel to Bolivia to the start of 'Death Road' to meet Ray Goggins and embark on a gruelling a seven-day challenge
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4. Bölüm Champion Galway hurler Joe Canning and track and field star Thomas Barr meet Ray deep in the jungle of Colombia, where he greets them with deadly snakes and spiders