When does Black Lagoon return?

Black Lagoon is a Japanese manga series written and illustrated by Rei Hiroe. It has been published in Shogakukan's seinen manga magazine Monthly Sunday Gene-X since April 2002. The series follows the Lagoon Company, a four-member team of pirate mercenaries smuggling goods in and around the seas of Southeast Asia with their PT boat. The manga received an anime television series adaptation by Madhouse, which was broadcast for two seasons of 12 episodes each in 2006.