|Portrayed by||Karl T. Wright|
|First appearance||Don't Look Back|
|Occupation||High school principal|
Principal Marks asks Claire and Jackie to line up with the other cheerleaders for Sheriff Davidson so that Officer Ramsford, the firefighter to whom Claire brought the injured man, can identify the girl responsible. Marks expresses surprise that the hero is so reluctant to come forward.
During lunch, Principal Marks posts the Homecoming Court announcement on an outdoor bulletin board.
- This Principal Marks is the principal of Union Wells High School where Claire Bennet attends. The principal of Pinehearst High School where Tommy Clark attends is also named Principal Marks.