Quiz in which contestants get the chance to win the biggest cash prize in British TV history with a limitless jackpot. First up are sisters and best friends Tina and Tracy, who take on the Limitless Ladder in an emotional game that brings tears to the eyes of Ant and Dec, followed by childhood sweethearts Bianca and Ky, who hope their approach will help propel them into the truly life-changing sums of money on the ladder