The third season began airing on 22 September 2011, with the first episode being 90 minutes.
Challenges and eliminations
Episode 1: 22 September 2011 [27]
The geeks applied their knowledge in a "Fashion-atomy" challenge, which involved painting on their beauties specific items of clothing and being judged by Camilla Franks. The beauties then did a "Round-the-World" challenge by matching selected foods to the country that they are associated with on a large map of the world. Helen and Troy were first introduced.
Episode 2: 29 September 2011 [27]
The beauties took part in a zoology challenge, in which they put their hand into five crates with an animal inside, feeling it, and then naming each animal. The beauties were then offered immunity in a challenge where a disk was placed in a crate with 50 000 cockroaches inside, and the beauties had to pick up the disk with their mouth. The geeks took part in a "What's Your Number?" challenge, which had them approaching a female (a male for Helen) and asking for their number by flirting and finding interests.
Episode 3: 6 October 2011 [27]
The beauties and the geeks take part in a hero challenge where they each had to shoot a ball of paint at pictures of geek and beauty heroes respectively, and then name the hero. The geeks later took part in a roller-skating derby challenge in which a Sydney women's roller-derby team would try to knock them over. The last two geeks standing would then have to protect their beauties from falling over.
Episode 4: 13 October 2011 [29]
The beauties and geeks return to school as the beauties are assigned to teach a Year 7 class about either physics, chemistry, biology or volcanology. Afterwards the geeks paired up with their beauty to choreograph and perform a cheerleading routine, with the top two couples having to compete with a professional cheerleading team.
Episode 5: 20 October 2011 [27]
The beauties and geeks posed in a photoshoot which saw many of them strip down into underwear. The couple with the best photo would appear on the cover of the Famous magazine, and the geek of this couple as well as the couple that came second in the challenge would receive a makeover. After Lachlan and Helen's makeover, each of the geeks went out on a date with a female geek (male for Helen) specifically chosen to match their interests, with the beauties having to serve them as waitresses. Afterwards they were given a choice; they had the chance to swap their beauty for their geeky date. After a lot of controversy, none of the geeks turned in their beauty for their date. As a treat there was no elimination for that week.
Episode 6: 27 October 2011 [30]
The beauties designed a comic book superhero, and the geeks then had to design and make a costume for this superhero which the beauties would have to wear on a fashion parade. The geeks introduced their partner as they came out, and the beauties then had to describe the powers that their superhero had. Following this challenge the remaining four geeks who didn't have makeovers the previous week had their turn, with some amazing results. Using their new look they participated in a "Full Monty Challenge", involving each of them to perform a short dance dressed as The Village People at a local club with a big finale involving them stripping down to their underwear.
Episode 7: 3 November 2011 [31]
The beauties took on a spelling bee based on their respective geek's interest. Each time they misspelled a word their geek would receive an electric shock, and if they got the same word wrong twice in a row they would be knocked out of the challenge. The geeks then took part in a biker race, which had the beauties construct a bike and sidecar for their geeks to ride in, with the first beauty to finish giving their geek an advantage in the race. The geeks were to carry members of the HOGS motorcycle gang in the sidecar, with the geek whose partner finished building the bike first having the advantage of carrying the lightest biker, and the heaviest biker riding in the bike of the geek whose partner finished last. After the race the geeks were offered immunity; the first geek to step forward to have their beauty's name tattooed on their body would go through to next week. Lachlan took the challenge much to everyone's surprise, getting Sarah's name tattooed on his buttocks and consequently causing much drama in the house.
Episode 8: 10 November 2011 [32]
The beauties undertook a "Mustering Maths" challenge, which involved them attempting to round up a group of farm animals each with a number or mathematical symbol on them into a small enclosure to make an equation that would equal 60. Later the previously eliminated geeks who did not have the chance to get makeovers re-entered the house, with each of the geeks still in the competition giving them makeovers with a time limit of two hours. The beauties then voted on which made over geek had the biggest improvement, unaware as to which who made over which geek. However, a twist was introduce so that the two winning couples of the week (Gilbert and Jacelle in the Mustering Maths challenge, and Jimmy and Mackenzie in the style challenge) had the power to nominate a couple to return to the mansion, instead of nominating a couple to be eliminated.
Episode 9: 17 November 2011 [33]
The geeks were brought into an art studio for a "Woman Appreciation" challenge, in which they had 20 minutes to sketch a naked female model. While they were sketching her, the model kept talking casually about mundane things in her life much to their annoyance, and was generally being very distracting. However, at the end of the challenge they were told that they were not being assessed on how good their artwork is, but how much they listened, and so they were quizzed on things the model said. Afterwards the beauties had to work with their geek to find a figure or icon that represents the "London Look", which the beauty then had to dress up as and represent in a beauty pageant.
Episode 10: 24 November 2011 [34]
The geeks and beauties returned to school as they were graded on school subjects such as Science, Home Economics and Physical Education. The couple with the lowest average grade was eliminated, and the remaining three couples would attend the school formal. At the school formal the geeks would stand in a kissing booth and the beauties had to advertise their geeks to other people attending the formal. The couples then participated in a dance battle, and following these two challenges all the attendees had to vote on which couple had the strongest bond. The top two couples from this challenge then went to the elimination room for the final time where the scores were so tight that two tie-breaker rounds were held. The end result was a score of 5-4 with Lachlan and Sarah winning Season 3 of Beauty and the Geek Australia over Julian and Jordan.
| Week | Beauty challenge (winner) | Geek challenge (winner) | Elimination room | Eliminated |
|---|
| 1 | Food Round the World (Jordan) | Fashion Anatomy (Lachlan) | Darlene and Nathan
Gaia and Colin | Darlene and Nathan |
|---|
| 2 | Zoology (Jacelle) | What's Your Number (Julian) | Gaia and Colin
Dolly and Bendeguz | Gaia and Colin |
|---|
| 3 | — | Roller Derby (Bendeguz) | Emma and Adam
Mackenzie and Jimmy | Emma and Adam |
|---|
| Shooting Stars (Troy and Helen) |
| 4 | Science Fair (Jordan) | — | Jacelle and Theo
Dolly and Bendeguz | Jacelle and Theo |
|---|
| Cheerleading (Sarah and Lachlan) |
| 5 | Couples Photography (Sarah and Lachlan) | None |
|---|
| 6 | Superhero (Jordan) | Full Monty (Gilbert) | Troy and Helen
Mackenzie and Jimmy | Troy and Helen |
|---|
| 7 | Spelling Bee (Mackenzie) | Motorbike Race (Gilbert) | Jordan and Julian
Dolly and Bendeguz | Dolly and Bendeguz |
|---|
| 8 | Mustering Maths (Jacelle) | Style (Jimmy) | None |
|---|
| 9 | London Fashion Icon (Jordan) | Woman Appreciation (Jimmy) | Troy and Helen
Sarah and Lachlan | Troy and Helen |
|---|
| 10 | Back to School (Jordan and Julian) | Sarah and Lachlan
Mackenzie and Jimmy | Mackenzie and Jimmy |
|---|
| School Dance (Jordan and Julian) | Sarah and Lachlan
Jacelle and Gilbert | Jacelle and Gilbert |
| Winners | Sarah and Lachlan |
|---|
|
