Episode 3 - Giant's Gully
Couple Sion and Gareth struggle without their gadgets while strangers Dylan and Pete are attacked by insects, in an epic race deep in the Scottish Highlands - completely naked
Episode 1 - Deadman's Gorge
Deadman's Gorge: Two naked teams face a three-day race back to civilisation, including crossing a big gorge
Episode 1 - Deadman's Gorge
Episode 2 - Hell's Peak
Hell's Peak: Two naked couples race across disorienting moorland, dense forests, rivers and a mountain
Episode 2 - Hell's Peak
Episode 3 - Giant's Gully
Giant's Gully: Sion and Gareth miss their gadgets while Dylan and Pete are attacked by insects
Episode 3 - Giant's Gully
Episode 4 - Hunter's Fury
Hunter's Fury: Ant and Kim go off-route in search of food, while injury hinders Terry and Luke
Episode 4 - Hunter's Fury
Episode 5 - Dark Pines
Dark Pines: Dropped naked on a freezing mountaintop, Lilly and Luke race against Claire and Beau
Episode 5 - Dark Pines