The couples face their next role-swapping challenges - and both involve a lot of oil. The guys are tasked with learning how to give a good massage, while the girls break out the overalls for a stint as car mechanics.

The girls get to grips with rocket science, literally. First off they attend a lecture on the subject, and then are put to the test by having to launch the rockets they make - with varying degrees of success. The Geeks go shopping to pick a new outfit for their partners. The girls then model their new outfits in a fashion show later that evening.

The beauties give the geeks makeovers and the guys go out to get phone numbers from total strangers, and the rivalry grows between two of the contestants.

For the first time, the couples must all work together as a team to have a successful night of camping. The rivalry between Chuck and Richard reaches an all-time high, Scarlet gets upset at Shawn for getting sick during the challenge, and the romance between Scarlet and Chuck seems to fizzle out.

During their final day at the mansion, the teams spend more time getting to know each other and learning a skill at which the other excels - karate, cooking, kayaking, and piano - before the final elimination: a series of ten questions about their partner.