In this episode of The Krypton Factor four contestants from Auckland, Hawkes Bay, Dunedin and Wellington tackle 'television's toughest quiz' to decide who will return as a series finalist. The first round focusses on mental agility and word skills. In the second, contestants spot the changes in a mini 'TV detective drama', then the heat is on to correctly assemble a plastic pentagon puzzle. Host Dougal Stevenson's calm commentary reigns throughout. In the fourth round, contestants don track suits and make muddy work of the Burnham Military Camp assault course, before a final general knowledge round.