S2.E1 ∙ Episode #2.1

2199 AD. Yamato tries to leave behind the Large Magellanic Cloud galaxy after receiving a Cosmo Reverse System at its destination, Iscandar. However, suddenly it encounters a mysterious group at the edge of the Large Magellanic Cloud. The crew finds out that the group is called the Gatlantis, and that its leader is the Gutaba expeditionary force commander who calls himself Goran Dagam of Thunder. The commander demands that Yamato be handed over to him. Yamato, wanting to hurry to Earth, escapes the fray. However, Yamato is attacked by a devastating beam weapon called the Flame Direct Attack Cannon that can transcend space. Yamato is able to retreat, but ends up getting lost and finds itself in a strangely colored irregular dimension. The crew decides to turn off the ship's engine and explore a mysterious planet. In order to collect information Kodai, Kiryuu, Sawamura, Niimi and Aihara land on the planet. What they see when they arrive is a ship that's not supposed to be there. Dagam chases after the traces of Yamato's warp, and also reaches the strangely colored space. The planet where the crew of Yamato landed is in fact what Dagam has been looking for all along.

When the riot squad starts shooting citizens during the holiday season, the Major and her team must track down a terrorist hacker who operates under the name Fire-Starter.

First, a brutal terrorist attack on a NASA base takes place deep in the Arizona desert. Then ten days later, the corpse of a CIA man is found floating in the Seine in Paris. Are the two events connected? Monsieur Lassar of the French Secret Service thinks there is a connection, but he can't figure it out. He hires International terrorist, spy and master criminal Kousaburo Kuki to help. Kuki discovers film superstar Lamia Vindaw is the key to the mystery. She has become the focus of a CIA operative in Paris and more sinisterly, the target of a bizarre vampire cult. Can Kuki get to the bottom of the mystery and save the glamorous Miss Vindaw - or will he too become just another number in the bloody body count?

A watery world called Aquarius that is destined to destroy all of the planet Earth. Can the great Yamato stop this devastation?

Rumours arise in the Frontier government when Sheryl Nome arrives to the fleet for her concert and is marked a spy for Galaxy. Also Alto and Ranka both try to achieve their dreams as the battle between Frontier and the Vajra draws closer.

A recap of the first season of Sidonia no Kishi with additional scenes and re-edited sound effects.