Mairead Ronan is back on the hunt to find the nation's fittest families, with the first heat featuring McCarthys, the Lehanes, the Greenans, and the Bissetts
The O'Sheas Co Clare, the O'Briens from Co Cork, the Mooneys from Dublin, and the Sextons from Co Kildare battle it out for two places in the next round of the competition.
The McDonalds from Antrim, the Cuddys from Roscommon, the McIntyres from Tipperary, and the Corcorans from Westmeath battle it out for two places in the next round.
The fourth and final heat features four new families, from Clare, Co Wexford, Co Kildare and Dublin
The first of the two quarter-finals sees four families and their coaches hoping to do enough to stay in the game and progress to the semi-finals in the swamp
Four families tackle the elements - and each other - as they take a trip to a cold icy lake, all desperate for a place in the semi-final.
Mairead Ronan presents the semi-final as the six remaining teams compete for the four places in the final up for grabs, with the coaches pushing the families to their limits
The final four families compete for the title in Kilruddery, taking on Mountain Madness and new event Slingshot for points.
Grainne Gallanagh, David and Stephen Flynn, Sinead Quinlan and Neil Delamere bring their families to compete for the title in the name of charity.