In the first instalment, Tom Watson, Denise Lewis, Jodie Kidd, Craig Charles, Fleur East, Joe Weller, Jack Fincham, Lucy Fallon, Victoria Pendleton, Shaun Wallace, Adam Thomas and Kimberly Wyatt are split into two crews before facing their first epic leg at sea by rowing 90 nautical miles from St Ives to Pembroke, battling sea sickness and exhaustion on this 30-hour journey

The challenge to row the length of Britain enters its second day, which leads the celebrities faced with tackling wild Welsh water as they row up the coast of Wales. Politician Tom Watson confronts his fear of heights as he tackles a 130ft game of high wire catch, and the race at sea ramps up as Olympian Victoria Pendleton's competitive edge starts to ruffle a few feathers.

As the celebrities reach Northern Ireland and the Scottish islands, tensions emerge on board as the famous faces deal with rough waters at sea. The Blue Crew fall out over Jack Fincham's commitment to the competition, and Victoria Pendleton and Craig Charles come to blows over their competing purposes for taking part

The teams battle to win a pair of helping hands to see them through the next leg of the race - but who will the new crew member be? With the end in sight, the women take to dry land for possibly the toughest challenge yet - a race to scale one of Scotland highest cliff faces.

As their epic journey to row the length of Britain comes to an end, participants Tom Watson, Denise Lewis, Jodie Kidd, Craig Charles, Fleur East, Joe Weller, Jack Fincham, Lucy Fallon, Victoria Pendleton, Shaun Wallace, Adam Thomas and Kimberly Wyatt all have one final race to determine who gets to row to glory and be awarded the Golden Oar.