Teenage Mutant Ninja Turtles (2003): Season 4, Episode 16

4 - 16: Prodigal Son

Leonardo returns from Japan to find the lair in ruins and his family nowhere to be seen. As he investigates he finds that the Foot is back to full strength - with Karai as their leader. Since the Foot believe Leo to be dead, he puts all that he has learnt from the Anicent One into practice...