Series 4 begins just as the Technos are starting their invasion. They possess advanced technology and the mall rats are helpless against them. They raid the mall and take Alice, KC, Tai-San and May away to work in their labour camps. Cloe is the only one left in the mall after she hid from the Technos. She becomes distressed and finds comfort in Pride and later develops feelings for him, which he cannot return due to her age. While trying to overthrow the Technos, Jack is captured and taken away as well. Bray is taken while Amber is about to give birth. Trudy finds her and they rejoin the Eco tribe with their babies. Ellie and Jack rescue a former 'Mosquito' (a minor, all-girl Tribe) Dee from the Technos when she is zapped by their weapons.