When does Ben 10: Alien Force return?

Ben 10: Alien Force is the sequel to Ben 10 (2005–2008), set five years later and taking a darker turn than its predecessor. The series premiered on Cartoon Network in the United States on April 18, 2008, and on Teletoon in Canada on September 6, 2008. Ben Tennyson, now a teenager, once again joins the Omnitrix to protect Earth and other parts of the universe from villainous alien activity.