History
Professor Miles Warren was a cloning scientist whose cloning experiments were banned by the government. He then sought work underground where he continued his experiments. On his first attempt, the tissue he experimented with didn't hold together. He then learned of Hydro-Man's supposed death and captured a trace of his DNA. He was able to make the perfect clone, but it also inherited the memories of the genuine Hydro-Man. Bench threatened to kill the professor if he didn't bring Mary-Jane to him, but he told Bench that she had disappeared. Hydro-Man insisted Warren clone her. He took a sample of Mary Jane's hair from her comb, then mixed it with Hydro-Man's powers, making a perfect Mary-Jane duplicate, but she, too, had the memories of the real Mary-Jane, too, even love for Peter Parker.

Notes
- Voiced by the late Jonathan Harris.