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 capital city has been built from the remnants of the royal capital as the humans begin to prosper, including the ones who helped make it all happen. However, these peaceful times come to end when the threat mentioned in Lordgenome's last words starts to reveal itself.

Major events

 * Start of the second half
 * Mugan Debut