|Portrayed by||Breckin Meyer|
|First appearance||The Eclipse, Part 1|
Frack is a comic book enthusiast.
Hiro and Ando travel to Sam's Comics in search of the newest issue of 9th Wonders!, trying to figure out what to do next. Sam calls Frack over and they are both surprised, as they look at the new issue and see themselves on the cover, looking at the same exact issue, with Hiro and Ando standing in the background.
Sam accuses him of playing a practical joke, but Frack insists that he is not. He tries to assist Hiro in regaining his memory through the back issues of 9th Wonders!. Using a magnifying glass, he finds a clue to where Hiro has to go next. In a picture depicting Kaito Nakamura giving baby Claire to Noah Bennet, he spots present day Hiro and Claire hiding behind a window on Charles Deveaux's rooftop.
- According to Michael Ausiello, Frack's name was originally supposed to be "Doogie". In actuality, Frack's name is never mentioned in any episode. The name has been given in interviews (like the November 24-December 7, 2008, issue of TV Guide).
- Frak is a unique expletive in the television show Battlestar Galactica.