Operation Transformation

Presenter Kathryn Thomas returns to help more people try to lose weight and get fit with the help of health, fitness and diet experts.

Dr Donal O'Shea travels to Finland to see how the people of North Karelia came together to transform the health of the country.

The two remaining leaders hope their new regimen pays off on the scales, and the group members face their first team challenge.

The strain is beginning to show for some of the leaders, and the new 'Fit at School, Fit Forever' campaign is launched.

The leaders prepare themselves for their second challenge, and dietician Aoife Hearne discusses her experience of pregnancy and motherhood.

The leaders try to push themselves, but it remains to be seen whether or not their hard work will pay off at the weigh-in.

The halfway point nears as the week's final two leaders prepare to step on the scales, and Dr Ciara reveals her campaign to tackle childhood nutrition.

Over half way there, the end goal is in sight for our five leaders but that also means the 5K run is getting closer. It’s time to up the ante! Fitness expert Karl Henry is expecting more than ever but will it pay off on the scales? Our first three leaders find out at the weigh-in.

Nervous tension builds ahead of our second weigh-in of the week but that’s nothing compared to the terror our leaders face at this week’s challenge. Can they keep cool heads as the heat rises? The brave five will have to overcome some of their biggest fears to complete Dublin Fire Brigade’s latest drill. This week’s group, Gorey Cycling Club roll towards Saturday’s Family cycle day with association with Cycling Ireland.

A look at how the leaders took to the saddle on 'family cycle day'. Watch the brand new series of \"Operation Transformation\" on RTÉ One on January 6th 2016.

This week's top two leaders step on to the scales for a weigh-in.

Very soon our leaders, will be ditching the lycras and donning their glad rags for our finale special but the pressure is still on as they prepare for their penultimate weigh-in and nerves run high with only one week to go until the Operation Transformation 5K run.

With only one week left to go, the leaders face their final fitness test. Seven weeks after their original assessment, they are back in DCU, where Prof. Niall Moyna will be putting them through their paces. Before the excitement of finale week, Dr. Eddie helps the leaders reflect on how far they have come.

It’s finally here, the culmination of 7 weeks of hard work for our leaders and their followers. The 5K runs kick off in the Phoenix Park, Dublin and Blarney Castle, Cork. Emotions run high as dreams come true and our leaders and 8000 followers cross the finish line.

Tonight our leaders celebrate all they have achieved as they take to the catwalk for our finale show special. It’s their time to shine as they strut their stuff in front of family and friends and their final transformation is revealed. Final.