Aldnoah.Zero: Then and Now (The Day We Saw the Bird) Season 1, Ep 8
Magbaredge and her crew discover a ship hidden underground. They realize it was an Earth ship designed to be powered by an Aldnoah drive, but abandoned when it could not be activated. Princess Asseylum reveals her identity and activates the ship's Aldnoah drive. Meanwhile Cruhteo interrogates Slaine in his landing castle as Saazbaum observes. As the interrogation proceeds, Saazbaum makes a decision.