Dr. Otto von Death is a major villain who appears in every episode, despite "The Narrator" claiming he will never be seen again after the episode "Classic Titans".
Otto von Death is a minor villain who creates a dinosaur army to wipe out the human race. He grew up as a strange boy, not like the rest. He has a wife who is always on his case, his daughter moved away with her boyfriend, she said she couldn't live another day in his house and his son just sits on his computer inside his room.
- Classic Titans (debut)
- It is possible that he is very good at building robots. As he built a robot dinosaur army to wipe out mankind.
- He has a pet Tyrannasaurus Rex who tried to destroy the titans.