While in the Arctic Circle, the Titans once again take on Dr. Light. And when an accident sends the Titans through the ice, they discover a new exotic Underworld - and two new superheroes, Kole and her caveman sidekick, Gnarrk. Unfortunately, Dr. Light has plans for Kole.
Elenco: Hynden Walch , Scott Menville , Greg Cipes , Khary Payton , Tara Strong , Ashley Johnson , Dee Bradley Baker , Ron Perlman .