What one of special kicked off the sixth season of Robot Chicken?
Robot Chicken (season 6):  Season six officially began on September 9, 2012, on Adult Swim, with "Robot Chicken DC Comics Special" and will contain a total of twenty episodes. Robot Chicken DC Comics Special: Robot Chicken DC Comics Special is an episode of the television comedy series "Robot Chicken" and it was aired as a one-off special during Cartoon Network's Adult Swim on September 9, 2012.
Robot Chicken DC Comics Special