Red alert - the huge Indominus rex has broken out of the impound! Zach is inside the gyrosphere launched from the pen wall and now he's under attack. Direct the hunt for the rampaging beast from the impound's research tower. Set off in hot pursuit in the helicopter, evading the dinosaur's snapping jaws and swiping claws. You must get that dangerous dino safely back in the pen before it causes serious damage. Includes 4 minifigures with assorted weapons and accessories: Zach, an ACU trooper, Dr Wu and a vet.