24 pairs of twins face gargantuan challenges on an enormous athletic field. The bonds between twins are pushed to the limit in the Ultimate Athletic Tournament! The tournament consists of three insanely difficult obstacle courses. Human drama can be seen behind these challenges. Participants are limited to twins, but what constitutes a “twin” is unclear, resulting in some unusual pairings. In the past, controversial appearances have included clones, adopted siblings, or triplets in shifts.