The contestants prepared for a surprise weigh-in, with the second Immunity and another 24-hour leave pass on the line. Lydia lost the biggest number, winning her the massive reward. The other housemates trained with the Manly Sea Eagles, with Shannan once again meeting resistance from Hamish. The final Immunity and leave pass were on offer to the winner of a chocolate-themed Temptation. The rules were simple: whoever ate the most was declared the victor, with the players blindfolded so they weren’t influenced by their peers. For another week, Hamish played and looked to be cruising to victory.

Hayley explained that Immunity Week was about to commence, giving contestants multiple chances to keep themselves safe. Graham returned from the Elimination Room, much to the relief of his team. Luke gave his all in training, feeling guilty for Ryan's exit, while Hamish gave his best performance yet. Lydia broke down in Red Team training, although Michelle helped her resolve to lose a bigger number at the next weigh-in. Tired of his team's "hot air", The Commando made absolutely sure Graham was getting his "no excuses" message. For the first of the Immunity Challenges, the contestants had to move bricks by hand from one pallet to another. The first to transfer all of theirs won both safe passage and a 24-hour pass home. In a tight race between Margie and Luke, it was the Blue Team member that took the win. Hayley then surprised the other competitors with a fresh game twist.

The girls emerged as victors at the battle of Hell Hill, winning them a 2kg weigh-in advantage. Ryan again broke down in training, as Shannan and The Commando struggled to break down his barriers. Luke, meanwhile, entered the boxing ring with Shannan and in an impressive performance gave as good as he got. At weigh-in the results were mixed, with Blue and Black Teams falling beneath the Yellow Line. Graham and Ryan volunteered to go up for Elimination, with the vote going against Loser’s biggest even competitor and sending him home.

In extra footage from the latest week at Camp Biggest Loser, Shannan exploded at Ryan for not committing himself 100% to changing his life. New scenes delved deeper into the house’s burgeoning relationships. Following an extended catch-up, Brenda proved herself to be going great guns on the outside, following her diet and new training regime. Dr Swan stopped by to update her bio age, before she received a special makeover as a reward for her hard work.

Hamish won Temptation after beating Ryan and Michelle deciding not to play, securing himself Immunity and a night away with another contestant – but at the cost of 1873 calories. Hamish chose Michelle to join him. Shannan tried to get Ryan to push himself in training and prove he had much more to give than he’d shown in the Contest. Hayley welcomed special guest Sammy from series four to dispense some advice about learning to appreciate yourself. The Offsite Challenge – Hell Hill – pit the girls against the boys, running up and down a massive sand dune. The first team to complete 50 laps won. The teams were closely matched, but a breakdown from Ryan in the closing stages threatened to tip the scales.

Lydia went on The Walk, choosing the box marked ‘Food’ before going back to Camp to reveal that the boys would only be able to eat orange foods for the next week. The girls trained, with Michelle getting them to write some of the hateful things they’d be called in their lives as motivation to fight even harder. The contestants got dressed up for ‘Silver Spoon Temptation,’ with food prepared by celebrated chef Michael Moore. With Hamish determined to win Immunity, he powered through, with only Ryan standing in his way in the final round.

Brenda’s Elimination caused friction in the house, with Margie accusing Bek of breaking her pledge not to vote out any of the girls. The contestants headed to the weigh in room, to learn that they were being split into two teams for an upcoming Contest: girls vs boys. The teams trained, with Bek’s progress frustrating her new teammates. The teams then entered the Contest arena, with Hayley explaining that the winner would receive the power of The Walk. Margie bested Ryan in the strength round, before Michelle beat Luke in an epic test of speed, sending Lydia out to choose the boys’ fate.

After an epic finish to the Valley Stampede Challenge, the Blacks beat the Blues, leaving the latter saddled with a 2kg penalty at weigh-in. Luckily for them they had Team Immunity. Watching from The Bunker, Shannan and Tiffiny discovered that their teams hadn’t been according to the schedule, with Tiff letting her anger be known. The contestants then entered the weigh-in, with only one spot available above the Yellow Line. Against all odds, the White Team secured it, with Selena justifying her second chance as the week’s biggest loser. The distraught Reds and Blacks then nominated Brenda and Alex for Elimination, with Brenda receiving the most votes and leaving the competition.

The Blues were revealed to be the only players of Temptation, winning then team Immunity. Despite their prize Shannan let his disappointment be known, putting them through a gruelling training session in which Luke excelled. Michelle quizzed the Reds about their exercise – or lack of – during Temptation and showed them some simple routines they could have used to keep active. The teams then left for the Valley Stampede Challenge, working in pairs across a punishing obstacle course. During the Challenge Shannan continued to struggle to motivate Hamish, while the Reds against marked themselves as the team to beat by taking the win. The Whites took second, leaving the Blacks and Blues battling to avoid a last place finish.

The contestants received letters from home, which spurred them on in training. Shannan inspired Hamish to push through some barriers on the spin bike, who impressed his trainer by managing to keep pace with Luke. The teams arrived back at their rooms to be greeted with sweet treats aplenty, letters explaining that a 12-Hour Temptation had begun, with team Immunity up for grabs. In a show first, the trainers watched Temptation live from The Bunker. The Blacks and Reds held strong and refused to play. The Blues, fearing they would fall beneath the Yellow Line, opted to participate, while the Whites conducted a secret ballot to gauge opinion on whether to take Temptation or not.

The teams continued to confer in the Elimination Room before casting their votes, leading to Shane’s exit from the competition. Hayley revealed to the trainers that Camp Biggest Loser was bugged with cameras, revealing shocking truths about some contestants’ continual bad eating habits. The trainers were then shown The Bunker, from which they could monitor what was really going on in the house. The teams trained, before being taken out of Camp Biggest Loser for a public speaking task, which saw them battling their nerves to share their heartbreaking life stories.

The Sheep Herding Challenge concluded, with the Red Team putting in a supreme effort to beat the Blacks and win a 2km advantage at weigh-in. Selena re-entered Camp Biggest Loser, before the contestants got down to Last Chance Training. Shannan tried to make James see sense about the money and stay in the competition, while Michelle tried to get to the root of a resistant Brenda’s struggles. In the weigh-in room, James announced his decision to take the $30,000 and leave the game. The weigh-ins produced modest losses across the board, with the Reds topping the leaderboard and Margie winning Biggest Loser of the week. The Whites and Black were below the Yellow Line, with Shane and Michelle nominated to face Elimination.

James continued to mull over whether to take the money won at Temptation, much to the dismay of his team. Shannan tried to get the Blues to see James’ side of the story, then got them to focus their feelings into a training session. The Commando gave his Black Team some pointers about healthy eating, before the contestants departed for their next Offsite Challenge: sheep herding. Round by round, the teams faced off, needing to each pen seven sheep to progress. The Reds beat the Whites, while the Blacks saw off the Blues, leaving the stage set for a dramatic final.

Shane returned from the Walk, revealing to the contestants that he had won the power to bring an eliminated contestant back and was giving Selena a second chance – news not greeted warmly by all. The teams were put through a gruelling training session, with Brenda opening up to Michelle about her past struggles and Hamish pushing past the pain with Shannan. Temptation revealed a room full of calorie-heavy treats, with Hayley explaining that a prize of $30,000 in gold bullion was up for grabs for the person consuming the most. Only two played: Lisa, who ate a modest 90 calories, and James, who piled away a massive 960. The twist: if he took the bullion he would have to leave the house forever, leaving him with a huge decision to make.

The fallout from Monday’s elimination was fierce, with the trainers demanding to know why Margie opted to vote Selena out of the competition, sending the Red Team member storming out. The teams then proceeded to training, giving their absolute all. Afterwards Hayley revealed the first Contest, which saw Michelle, Luke, Lydia and Shane battling it out for their teams over three rounds of mental and physical strength. The final came down to Luke and Shane, with the latter taking the win and going on The Walk. Hayley explained he could now choose from one of three boxes: power over food, training or a mystery option. Shane opted for the mystery box, and though not revealing its contents looked a little unsure about how his fellow contestants would react to the game-changing development.

After a tight battle the Black Team bested the Reds in the Ferry Pull Challenge, winning them a 2kg weigh-in advantage. Selena collapsed, exhausted from the effort. The contestants gathered themselves and entered the weigh-in room for their first competitive visit to the scales. The loses were hugely impressive, though with the lowest percentages Selena and Hamish were left facing elimination. In the elimination room Hayley revealed a twist – the teams above the Yellow Line could choose not to vote anyone out. Yet Margie, questioning Selena’s commitment, voted for her, forcing the other contestants to vote themselves and setting in motion a chain of events that resulted in Selena’s elimination.

Despite Hayley piling on the pressure by adding further chances for immunity to the wheel, none of the contestants decided to play Temptation. Though happy at the news, Shannan then hit the roof after discovering that his team hadn’t burned off the 600 calories each he’d set them for homework. The Reds suffered a similar fate when the in-house cameras showed Michelle that Lydia was the only one up early training. The first Off-Site Challenge was revealed, each team jumping into a row boat and towing a 110 tonne ferry. As the episode came to a close, the Reds and Blacks were neck-and-neck in the battle for first place.

As training continued, Tiffiny left the dojang to clear the air with Bek. Ryan continued to suffer but was lifted by his teammates. In the yard, The Commando got to work on his Black Team, with Alex initially struggling but ultimately drawing on reserves of strength he never knew he had. The contestants shared their reasons for applying to be in the show, before being told their bio ages by Dr Swan and shown what their collective body fat looked like. A series of hidden cameras later showed that the Blues hadn’t been sticking to their morning training commitments, then Hayley revealed The Wheel of Temptation. With the chance to spin for immunity on the line, the teams were doing their best to resist; only James appeared as if he might just be willing to gamble.

The weigh-ins continued, with the Blue Team’s Ryan setting a record as The Biggest Loser’s heaviest ever participant. Out of the weigh-in room, the contestants savoured their new surroundings before getting their first taste of training. Shannan urged his Blues to leave no man behind as Ryan struggled; Michelle’s recruits ran up and down the stairs of Camp Biggest Loser, fighting the desire to give up; while Tiffiny pushed her ninjas to their limits, resulting in Bek throwing a bar off an exercise bike in protest and getting ejected from the dojang.

Ready for another season of action, Shannan, Michelle, The Commando and Tiffiny visited locations across Australia to inform their team members they had secured themselves coveted places on The Biggest Loser Singles. The trainers got to see their trainees in their everyday environment, including what their typical diet consisted of. Each possessing their own heartbreaking story, the contestants were unified in their desire to change their lives, and find someone to share them with. Once back at Camp Biggest Loser and into their colours, the excited teams met in a rain-drenched yard and prepared to begin their journey. Hayley then revealed it was time for their first weigh-in, with friends and family joining them for much-needed support.