When does Fringe return?

Fringe premiered on the Fox network on September 9, 2008. It concluded on January 18, 2013, after five seasons comprising 100 episodes. The series has been described as a hybrid of fantasy, procedural dramas, and serials. It spawned two six-part comic book series, an alternate reality game, and three novels.
Fringe follows the casework of the Fringe Division, a Joint Federal Task Force supported primarily by the Federal Bureau of Investigation. The force's work often intersects with advanced biotechnology developed by a company called Massive Dynamic, founded by Walter's former partner, Dr. William Bell (Leonard Nimoy)