When does Terminator: The Sarah Connor Chronicles return?

The Sarah Connor Chronicles aired on Fox from January 13, 2008 to April 10, 2009. It is a spin-off from the Terminator film series, disregarding the events of Terminator 3: Rise of the Machines and picking up shortly after Terminator 2: Judgment Day. The series was produced by C2 founders Mario Kassar and Andrew G. Vajna, who also produced Terminator 3.