Heyerdahl was a human archaeologist in the 24th century. Heyerdahl was a member of the team assembled by Professor Gabriel Collins to look for the legendary Gretharan weapon, the Krialta, on planet Icaria Prime. However, Heyerdahl was incapacitated when the artifact was discovered and inadvertently activated. (CoE eBooks: Remembrance of Things Past, Book I, Remembrance of Things Past, Book II)