One of the sisters competing for £20,000 in this year's Race Across the World has promised viewers a "very intense" finish to the Bafta-winning show.
Elizabeth and Letitia, from Worthing and Lancing respectively, have been pitting their wits against four other teams as they aim to travel from China to India without smart phones or credit cards.
The pair are in second place - just seven hours behind leaders Caroline and Tom - ahead of Wednesday's finale.
Speaking ahead of transmission, Elizabeth admitted the experience has been "exhausting" but worthwhile.