Geo-Force seeks answers about the new Terra’s identity in “Sibling Rivalry.”

Geo-Force stops by the Titans headquarters to talk with Terra. After a knock-down fight, the two sides make peace. She tells Geo-Force she doesn't know much about her past. Then Terra is kidnapped by Markovian scientists who feel they have a right to duplicate her powers against her will. They are defeated soundly by Geo-Force and the Titans.