From Here to Eternity

The aerial cities continue to multiply. Kunugi decides to evacuate everyone from the island and stay by himself to try to stop the D1 headed their way. TERRA leaves with everyone else. The D1 is the Dolem of Kuki, Kunugi's former superior officer that gave him the order to kill his own daughter. It reaches the island of Narai Kanai and starts destroying cities. Kunugi sends some missiles and remote control fighter jets, but they do no good. The D1 attacks the building he's in while Kuki taunts him. Kunugi is injured, and Kuki says it's over. But Kunugi tells him that the entertainment has yet to begin, and activates the barrier creating thing. The barrier destroys everything in it's path, including the cities, Kunugi, Kuki, and the D1. Ayato makes a choice to join with Ixtli in order to protect Haruka.

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S01E24 - Doorway to the Tuning