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1 - On Tuesday's night show, we meet the 19 hopefuls who made it to Sportslink in Santry for a day of rigorous assessment by our three experts Karl Henry, Dr. Eddie Murphy and Dr. Eva Orsmond. Kathryn will unveil our first two leaders - Deirdre and Gavin, and Operation Transformation travels to Harvard University to meet Dublin scientist Dr. Lydia Lynch whose groundbreaking research made headlines worldwide when she showed the link between obesity and cancer. We also meet running man John Casey who after taking part in our 5K Fun Run in the Phoenix Park last year has now gone on to take part in the Iron Man in Galway and has lost a total of 10 stone.

2 - On Wednesday's night show, we meet our first group of 2013 and Kathryn unveils our final three leaders, Charlotte, Greg and Monica. It's also our leaders very first fitness test where Karl Henry shows them the hard journey they have to embark on over the next 7 weeks if they are to lead the nation in the Operation Transformation 5K Fun Run in February.

Kathryn Thomas discovers how the two of our leaders are getting on with their new lifestyles and diets, before another weigh-in and all the leaders face their first army challenge.

The three remaining leaders face their weekly weigh in.

See how three of our leaders got on in their second weigh in.

Tune in to see the army challenge and our final two leaders weigh in.

This week on Operation Transformation, it’s the midway mark and our experts want to see the five leaders knuckle down and focus on the forthcoming month before the finale.

We follow up on Step It Up. Gavin and Charlotte face the weigh in this week and all the leaders are put through the weekly army challenge.

On this weeks show, we see Dr.Eva and Charlotte reconnect and make new plans in order for Charlotte to reach her target. We also see Greg adding a new member to the family, and getting back on the rugby pitch for some training with Karl Henry in order to prepare for the 5K run. Monica heads out with her kids for some family fun time, and also hit the town of Carlow with Kathryn Thomas for a well deserved night out. These three leaders step back onto the scales for the fifth week in a row, hoping to reach and beat their target weight.

See how Gavin copes with last weeks exercise after injuring his knee, how the support of you, her husband and friends help Deirdre get motivated after a very hard week and of course the pairs' face to face with the scales. You also get to see our Leaders participating in the week 4 army challenge, Kathryn getting pushed and national schools and teachers getting involved in this years Step It Up campaign.

Tune in to see how Deirdre, Greg and Gavin fared this week.

Tune in to see how the Monica and Charlotte fared this week. Will the leaders beat the experts in this weeks Army Challenge?

The experts and leaders come together to put forward a health plan in The Dáil. Deirdre, Charlotte, and Greg face the scales.

Gavin revisits his childhood passion - Taekwon-Do and Monica makes a big decision about her future.

It's the final week and the leaders take on the 5k run in the Phoenix Park. Kathryn Thomas invites the leaders to her house for a special dinner and Brendan Courtney gives some style advice before the big reveal.

Our leaders come to the end of their journey on Operation Transformation and reveal their big makeovers.