Mumm-Ra is informed by Lantan Lin that there is a second Eye of Thundera, but it is in the city of Metropolis, which is very distant from Thunderra. So Mumm-Ra decides to use his Orbs of Barrack to teleport to Metropolis and get the second Eye. Luckily Nupil was spying on Mumm-Ra, and tells the Thundercats.