Rounds: Here.
Richard asks for information about more of Ian's travels; Ian responds that he cannot forget climbing Mount Kilimanjaro. They started the ascent at 1:30 in the morning and zigzagged up a scree slope to get to the top of it before sunrise. That must have been quite something! Ian says that it took a lot out of him, but he managed to get back down again.
Much later in the show he mentions that his next travel plan is to go to Western Australia and walk the Bibbulmun Track.
Tonight's challenger is Brent Dalton, a mechanical engineer. Brent has an ambition to build his own car; he says that it takes time, money, and inclination, and he has always had two out of three but now it is getting to the point where he can put it all together.
Brent is able to keep up with Ian for a while, but Ian manages to outscore him in two letters rounds and a numbers round. That gives Ian a win before the final numbers game, and with nothing to lose Brent opts for a challenging rat pack. It turns out to be too difficult for either, but Ian solves the conundrum very quickly to seal a 59 to 26 win.
I was doing well until that rat pack, which proved difficult for me. I managed to solve the conundrum faster than Ian to end up with a good score, and fortunately post-game solving showed that the rat pack wasn't the only optimal game spoiler. A good week so far!