Torlakh

was a Zygon who was trapped on Earth during the late 20th and 21st century. He and his superior, Kritakh, had been sent to Earth in order to release nuclear waste into the air, so that 100 years later the planet would be warmer and more hospitable by Zygons. Torlakh was reckless, often trying to avoid duties to "shag" with human females. Kritakh would often have to remind him to concentrate on the mission.

In order to blend in more, Torlakh took the appearance of convict Bob Calhoun. Similarly, Kritakh stole the body of Michael Kirkwood. However, Kritakh soon slipped too far into the persona of Kirkwood, and began to think that he was indeed him. "Kirkwood" began to see a doctor named Lauren Anderson about his visions of being a Zygon. Torlakh began to stalk the woman, with the hope that she would help Kritakh remember who he was. (BBV: Zygon: When Being You Just Isn't Enough)