He returned once again, after Loki had restored his memories, accompanied by a mining robot from the future and forced Thor to travel with him to the future, where the Thunder God would be his slave, enabling him to take over the world. Thor escaped his control, however, and Zarrko was put in prison. When the Governments of Earth launched a massive assault on Asgard, Zarrko tried to escape with his time machine, only to be stopped by Thialfi.