The next day, Mark suggests that they take Deedee to Alaska, since she is immune to the Flare, and she may be able to help them with the cure. They fly over to Alaska, with Mark, Trina, and Alec getting sicker with every passing minute. Alec is almost a full-blown Crank, and it is only his pure willpower that is keeping the berg flying. The drop Deedee off at the headquarters, and right after, Alec loses it. He crashes the berg, presumably killing Mark, Trina, and himself.
Deedee is later revealed to be the name of Theresa before WICKED renamed her.