Just What Exactly Is a Human?
The death of Thymilph has brought about the concern of the Spiral King (Lord Genome), meanwhile the Great Gurren Brigade managed to take control of the enemy fortress, but are still mourning other the death of one of their own. Simon is greatly affected by it and falls into a deep depression. After falling off a cliff and into a deep valley, he later notices a Gunman throw a capsule into the murky valley. He manages to open it only to discover a young human girl named Nia.
Aired 27/05/2007EP 9 - Just What Exactly Is a Human?

Gurren Lagann
In a far away future, mankind lives underground in huge caves, unknowing of a world above with a sky and stars.
In the small village of Jiha, Simon, a shy boy who works as a digger discovers a strange glowing object during excavation. The enterprising Kamina, a young man with a pair of rakish sunglasses and the passion of a firey sun, befriends Simon and forms a small band of brothers, the Gurren Brigade, to escape the village and break through the ceiling of the cave to reach the surface, which few believe exist.
The village elder won't hear of such foolishness and punishes the Brigade. However, when disaster strikes from the world above and the entire village is in jeopardy, it's up to Simon, Kamina, a girl with a big gun named Yoko, and the small yet sturdy robot, Lagann, to save the day.
The new friends journey to the world above and find that the surface is a harsh battlefield, and it's up to them to fight back against the rampaging Beastmen to turn the tide in the humans' favor! Pierce the heavens, Gurren Lagann!