You will Watch Teen Titans Episode 13 online for free episodes with HQ / high quality. Stream cartoons Teen Titans Episode 13 Apprentice The Titans can’t find a trace of Robin and start getting worried. That is, until they catch him red handed robbing a facility as Slade’s apprentice. After being defeated by Robin, the Titans are sure he has become a criminal. Slade is threatening to destroy Robin’s friend’s if Robin does not cooperate. At the end, half of Slade’s mask is removed which allows the Titans and Robin an escape from his clutches.