The race to St John's continues as the five pairs leave the gold rush boom town of Dawson City and head south to the third checkpoint, 2,700 km away in the province of Alberta - the picturesque resort town of Banff. Perched in the Rocky Mountains, 4,500 feet above sea level, Banff is the highest town in Canada, and in this leg, there is a need for speed as the team who reach the checkpoint last will be eliminated from the race.Trisha and Cathie are in the lead, but spent big to hire a car in the last leg, so need a cheaper strategy this time. Disaster strikes for 25-year-old Monique, who injures herself at the checkpoint, causing a three-hour delay. Her father, Ladi, makes a vital decision that could catapult them back into the race, but there is a catch. The threat of elimination brings out the competitive sides of married couple Zainib and Mobeen, who have differing ideas about who is boss. Marc realises he has to face up to his fears if he and brother Michael are to claw back some time and avoid elimination. Stragglers Claudia and Kevin start the leg with different priorities: Claudia wants experiences, whereas Kevin only has the race on his mind. Their situation takes an unexpected turn when they meet a Catholic missionary called Miriam, who could be the answer to their prayers.