When does Gurren Lagann return?

Gurren Lagann is a Japanese mecha anime television series. It was directed by Hiroyuki Imaishi and written by veteran playwright Kazuki Nakashima. The plot focuses on two teenagers, Simon and Kamina, who live in a subterranean village and wish to go to the surface. Using a mecha known as Lagann, they reach the surface and start fighting alongside other humans.