Episode 17

You Don't Know Anything! is the 17th episode of the Gurren Lagann anime. It first aired on July 22nd 2007.

Synopsis
Seven years have passed since the capture of Teppelin and under Simon's leadership, a new capitol city named Kamina City has been built from the remnants of the royal capital as the humans begin to prosper, including Team Dai-Gurren.

Simon is seen in his office signing several documents when Rossiu gives him another stack, much to Simon's dismay. Nia enters the office with lunch for Simon. She offers to make a lunch for Rossiu too, but he refuses due to the trouble it caused him before. Rossiu tells Simon there will be a council meeting in 15 minutes.

At the start of the council meeting, Leeron, Chief of the Science Bureau, contacts Simon and Rossiu, informing them that the Moon Probe Gun Rocket has been launched and will reach the moon in one day. It is then revealed that the council is composed of Kittan, Dayakka, Iraak, Kidd, Zorthy, Jorgun and Balinbow. Simon recalls Lordgenome's last words and Dayakka is amazed at humanity's increased knowledge about the moon. Rossiu asks Jorgun how the census is proceeding to date, but he is unable to answer. Zorthy thinks Jorgun and Balinbow are not fit for the job, causing Rossiu to lash out at everyone for their laziness. Simon gives Rossiu permission to give orders to the Citizen Affairs Bureau and assures Jorgun and Balinbow that their statuses won't change as a result.

After the meeting, the council members go to the Pig Mole Steakhouse, where Jorgun and Balinbow, angry at Rossiu for his outburst, eat several pig mole steaks at once. The chief of Jeeha Village is shown to be the owner of the steakhouse and has become very wealthy, sporting a white suit, a gold fan, and several pieces of gold jewelry. Kittan notices that Dayakka looks bummed out and tells him not to worry about the Spiral King's final words. Zorthy reminds Kittan that Dayakka's child will be born soon.

Nia goes to Dayakka's house to tell Kiyoh (who married Dayakka during the timeskip and is now pregnant) and Kiyal that Simon has proposed to her. However, she turned him down because she misunderstood Simon's words. Kiyoh tells Nia that the meaning of the words are not inportant. Rather, Nia should respond based on how the words make her feel. Kiyoh gives Nia the phone to talk to Simon. Meanwhile, Simon is looking the Kamina Statue and has a flashback of Yoko's departure from Kamina City. In the present, Simon gets a phone call from Nia, who agrees to marry him, much to his joy. Rossiu finds Simon and tells him that Viral is causing trouble and is battling the Grapearl Squadron. Simon offers to battle him in Gurren Lagann, but Rossiu refuses to let him go.

Gimmy and Darry, the commanders of the Grapearl Squadron, defeat Viral and his Enkidudu and arrest him. Simon contacts Viral via holo message and ask him what he was doing. Viral says he was merely protecting humans who wanted to live underground and that said humans were being taken to the surface against their will. For this reason, he believes Simon to be imitating Lordgenome. Rossiu tells Viral to stop justifying his actions and that his fate will be decided at his trial.

Major events

 * Start of the second half
 * Mugann Debut