In season three, the different perspectives of the alien invasion collide for the first time as the main characters are brought together to work as a team on a critical mission to infiltrate the alien mothership. The ultimate apex aliens have finally emerged, rapidly spreading their deadly tendrils across the planet. It will take all heroes working together, using their experience and expertise, to save the species. New relationships are formed, old relationships are challenged and even shattered, as an international cast of characters must become a team before it's too late.