As Josh, Yoko and Brett return to Earth from a mission, they suddenly have Hornet problems and are forced to crash land on a small, uncharted planet. When they get out to assess the damage, they realize they're in more trouble than they thought -- they've landed in the middle of a strange coliseum where they are left with no choice but to fight a giant alien creature! As the gang works together to defeat the baddie (to the delight of the crowd of aliens around them), they ultimately discover that the beast is not real -- just a mechanical dummy created by the planet's aliens!