When does Unnatural History return?

Unnatural History is the second scripted, live-action show on Cartoon Network after the failure of Out of Jimmy's Head. The series consisted of thirteen hour-long episodes and premiered on June 13, 2010. It is only the second Cartoon Network show outside of Adult Swim and Toonami to have the U.S. rating of "TV-PG-V", and a parental-guidance warning.
This series is centered on Henry Griffin, a teenager with exceptional skills acquired through years of globe-trotting with his anthropologist parents. Henry Griffin moves back to America to attend Smithson High School in Washington D.C.