Astrea thinks she is the only Time Lady in existence. After the death of her recent companion, Sam, she turns human. She soon meets the Doctor and turns back to normal unaware of the events that lie ahead. Will she ever reveal to him the events of her past?

Two twins Aurora and Physic, the last Guardians of Cybertron. The guardians of Cybertron are a small team of bots with special powers given by Primus. Sworn to protect their people, they are now dying from the war, deceptions killing all remaining guardians and are now after them. A mech named Chromestorm killed their family unit and now after them. They flee cybertron and hope for a better life. Primus leads them to earth, where they meet Prime and his team of autobots.